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#“do you see how the diagrams of the atoms are totally different?” I want to put you in my mouth
bbunnyboyy · 6 months
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How I looked at pav when he told me why the schools textbooks sucked ass and the ones he just bought were amazing (I had no fucking idea what he was talking abt and barely saw the difference between them)
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chemblrish · 5 months
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Hey so you said you were doing physical chemistry- my school teacher ochem and inorganic at the same time so I am just gonna ask:
What the hell is up with the d orbitals? Like how they let transition metals change colour and act as catalysts? If you can, thank you!
Hey there!
Ohhhh the d-block elements are really cool! The d-orbitals are funky, what you're asking about here is pretty interesting. I wish I could help you with both of these concepts, but unfortunately we haven't covered catalysis yet, so I really don't feel qualified enough to talk about it. I can explain the part about changing colors though. It's all about the electrons, as usual <3
[Btw I'm actually studying this sort of thing in inorganic chem :D pchem is a whole different bag of bananas.]
So, the d-orbitals. I'm going to assume you're familiar with orbital diagrams - they'll come in handy here. With that in mind, please consider the following ions: Ti(4+), Cu(+), both of which are colorless, and then: Ti(3+) (purple) and Cu(2+) (blue). Sc(3+), Y(3+), and Zn(2+) are also colorless. See a pattern here? If not, let me help you out:
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As you can see, all the colorless ions have either full or totally empty outer d-orbitals, while the colorful ions have unpaired electrons on their outer d-subshell.
Quick and necessary digression: why are things colorful anyway? You probably know what the general mechanism here is, but just in case you don't, the simplest explanation is that when a photon hits an electron in an atom, the electron can then jump up to a higher shell. Electrons don't like staying up there though, so an excited electron will quickly jump back down to its original shell and release a photon in the process - which we see as colors .
[Yes, it is more complicated than that. Yes, I did greatly simplify it. Please don't throw anything at me, dear physicist friends.]
Now, back to our orbitals.
If an ion's outer d-orbital is full, it means the electrons there have no space to "move". They can't jump from one square (or rather from one orbital) to another because as per Pauli's exclusion principle, there can only be two electrons in a single orbital. Similarly, if there are no electrons whatsoever in the d-orbitals, there's nothing to "jump". Duh. The substance is colorless.
However, unpaired electrons mean there's at least one square (orbital) that can still accommodate one extra electron without breaking Mr Pauli's heart. As photons hit the d-orbital electrons, they keep "moving up and down" and releasing photons in turn - which gives them their color.
This, too, is a huge simplification. In fact, the d-orbitals can also split into levels of different energy and it's those levels that the electrons actually jump between. It's called the crystal field theory and you can look it up if you really want to start crying violently and having nightmares every night. If you aren't in uni yet though, it really isn't necessary. I think my explanation should be enough. I sure do hope it can be helpful :)
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loyallogic · 4 years
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Atomic Habits : the latent potential
This article is written by Ramanuj Mukherjee, CEO, and Kashish Khattar, Team LawSikho.
Hi, have you heard of this concept called latent potential? 
James Clear in his book Atomic Habits, explains the latent potential in a really interesting manner which can be very useful. 
Come to think of it, people are always hoping or wishing to do better. They want to lose weight, develop a skill, meditate, network. Everyone wants something better than what they already have, or at least if not for themselves then for those they love and care about. 
Most people are only hoping, wishing and thinking. But at times, they even try to take some actions. While thoughts can’t move a needle, actions over time can cause major changes.
However, here is the big stumbling block. Most people try to change everything at once, and take some now or never kind of approach, trying to change everything that they do not like about themselves at once, in one gigantic clean sweep.
That is very hard to achieve, and almost impossible. There is only so much you can stretch your willpower before you give up.
Soon they all fatigue, begin to go back to their old ways, one slip up at a time. Then they say that they do not see results and just give up. 
Everyone is looking for instant gratification. If they do not get it, they either blame themselves, and sometimes even the entire concept of self-improvement.
If you try to change your life wholesale like this a few times and fail, then you turn into a cynic quite inevitably. 
This is why most people find any meaningful change or self-improvement in their lives totally elusive.
So how can we make long lasting, real changes in our lives that produce massive results?
The way to succeed is quite the opposite – instead of trying to change too many things about yourself at once, you need to make small, almost invisible or seemingly invisible tweaks in your life. The habits you develop must be so small that it is not at all difficult to practice them and make them a part of your daily life almost effortlessly.
Success does not require humongous effort for a short time as most people think, it requires consistency. So the idea is to make a very small change and persist with it long enough till it becomes second nature – something that consumes no effort or willpower. 
Once you develop one habit and make it bulletproof, you can always add one more. And then one more. However, always one small tweak at a time. If you take a very challenging task, you will likely exhaust yourself and fail.
To make a meaningful difference, habits need to persist long enough to break through the ‘plateau of latent potential’. 
What is this plateau?
We expect results when we put in the work. Unfortunately, results take time to show. Just like if you plant a seed and water it, you need to wait for a while for it to germinate, you need to keep working while waiting for your results.
You can’t stop watering the soil. You can’t keep digging up to see if the seed is germinating. You need to let nature take its course.
It is the same with habits. You need to keep doing what you have to do. You will be on the plateau and you will not see results. Do, not, stop! You have to keep going. 
I repeat, there will be a point in time where you would expect results on your hard work, on the new habits that you have inculcated in your life. And you will find no proof that anything positive is happening. 
This is the point where you do not give in if you don’t see the results just yet. This plateau is the part of the process. 
James Clear provides a great diagram of this phenomenon in his book:
(source:https://ift.tt/2SxyIk7)
The fun part is that when you finally break through this plateau, people will call you an overnight success. 
Today, let us borrow this concept of latent potential from a fabulous book called Atomic Habits by James Clear. 
We can’t tell you how many times we see this phenomenon play out with our own students.
They start some new habits. Attending online classes, drafting legal documents, writing articles, networking, building up their social media presence. They consult our placement office on what to do to get that dream job or find their own client. 
We share many opportunities every single day, and they apply for a few of them.
They expect immediate results.
Then they fail to see a tangible result in a week or two. They get rejected a few times. Someone says something negative to them. They get low marks on a weekly assignment.
Then many of them stop. 
We know this will happen, so then we have processes to catch them at this point. We have coaches and course anchors who call them up, and try to bring them back to the grind. It would take more time, you need to hold on! You can’t give up when you hit the plateau!
To be honest, some people still refuse at this point because they can’t see success ahead of them. There are people who drop out. 
We knew if they continued, they would get the results they wanted. But they do not have the same faith. The ones who persist, reap the benefits. 
I can understand why people give up. If you have never experienced the transformative nature of habits and long term sustained effort, it is very hard to imagine the power of it. The results you can get are definitely beyond your imagination. You just need to stay with the good habits!
This is why it is so important to enjoy the process itself.
People love the end result. But those who love the process are unstoppable. 
Learning to love the process has been the biggest learning and biggest reward of my life.
But more about loving the process another day. Let’s stick to habits for now.
In order to make a difference, habits have to persist long enough to break through a plateau of latent potential. 
You will have to learn to make good habits. You have to make it obvious. You have to make it attractive. You will have to make the task easy. You will have to make the habit satisfying. 
How can you break bad habits? You can make it invisible. Make the bad habit unattractive. Make it difficult. Make it unsatisfying. 
It is aptly clear that when many people think that they lack motivation is when they really lack a workable plan of action. 
It may be hard to believe but disciplined people are not people with more willpower than you.  They are just better at structuring their lives in a way that does not require a lot of effort and willpower. 
They manage to design their life and environment in such a way that they spend less time in situations where they are tempted to break their habits. 
Writing 
Writing is the one habit that is highly encouraged within the legal circles. Writing makes your thoughts clear. Superior writing skills are the traits of a great lawyer.
Writing has dozens of career-enhancing benefits. This is a habit that takes time to inculcate. The plateau is rather stretched. But writing can change your life. Even at LawSikho, we encourage our learners to write more and write well. The idea is to make writing a habit. 
We personally recommend writing 50 articles, of around 1500-2000 words each in any area of law that interests you. Writing 50 articles may teach you quite a bit about a subject but it surely also makes you a better writer and helps you to develop a powerful habit.
This is also the number, on an average, around which you will begin to see undeniable effects on your legal career from this habit of writing and publishing.  
You have to imagine that your writing skills are young saplings, which you will have to keep watering to let them grow day by day to help grow an enormous tree. It takes time for a plant to grow into a tree, it will take time for you to become a better writer. But you will have to keep at it. 
Blogging, for instance, can change your professional life. Think about a blogger who knows what they are talking about and keep writing about it over a sustained period of time. You should read about this 28-year-old blogger who is now a must-read on economics in the United States. He does not hold any diploma in Economics. 
Think that through. What if you consistently wrote about just one practice area for 5 years? Could that help you to become the go to expert in that area of law? I have known mentees and students who have achieved exactly that. 
Upskilling
Continuous upskilling is another habit that is incredibly powerful for you to grow in your professional life.
A few exceptional law schools have been able to teach skills like legal research, advocacy, legal reasoning and analysis but nobody imparts practical legal skills to my knowledge, making transition from student life to being a lawyer quite hard. This problem also plagues mature lawyers trying to learn new areas of law.
Apart from hard legal skills like drafting, negotiating and legal strategy, lawyers desperately need to develop a commercial acumen for breakthrough success.
Every lawyer needs to understand how businesses are run, what drives them, what are their common sticking points, common reasons for dispute resolution, the trajectory for various sectors and the overall well being of the economy. 
These are some skills that you need to pick up in order to become successful as a legal professional. But this will take time. You will have to understand that the latent potential in you will get fired up when you give it the time to grow and keep working hard. 
If you are a young lawyer or a law student who is reading this, you should check out these different courses where we handhold you to develop these skills.  
Networking 
We are all worth our networks. 
You can make your own professional network. You can find your own mentors and create your own circle of influence. But you will have to work on it. You will not be able to see results immediately but they do come. And believe me, the results are worth the effort and all the time it takes. 
Persuasion and Negotiation
Some people are amazingly persuasive while others are not. However, it is a skill that can be learned, cultivated and improved systematically. It is a very important skill that every young lawyer needs to possess to win in the game. 
Whether you write or speak, you must do it to persuade, as opposed to just narrate or assert. You have to subtly make your point by being persuasive. 
Persuasion requires a deep understanding of the psychology of the target audience and customizing your message according to that. Persuasion often requires thinking on your feet because you constantly fine-tune your message according to the response or live feedback you see, hear, feel and even perceive.
Negotiation is another skill that should be picked by lawyers in the early stages of their careers. The art of negotiation comes with time. You learn how to listen more. Asset and express your needs in a manner in a non-aggressive manner. Learning how to not take everything personally is another subset of these skills. And as a lawyer, you should definitely know how to build trust, be it with your peers, your boss or your clients. It really does matter a lot in the long term. 
There are amazing books out there on the subject of persuasion and negotiation. 
As long as you take this skill which is very important to every lawyer seriously and try to learn it, you will find ways to excel and become a very persuasive lawyer.
How does LawSikho help in all of this? 
How can you learn of all these skills without fail, if you ask me? You would need a systematic approach to break your bad habits and inculcate good habits. Sometimes it helps to have a guide to see you through the plateau. This is where LawSikho can help. 
Our courses provide the learners with mentorship and guidance every step of the way. We make sure that all our learners are habituated to write at least one good article a month as a writing assignment in most of our courses, for instance.
We make sure all our learners know how to network and get the internships and jobs of their choice. 
We even have a placement and mentorship coach for that! 
There is the whole LawSikho community that we have developed and we let our learners tap opportunities coming from this network. 
When it comes to skills, we are sure that each and every one of our learners who do our courses diligently will be skilled in whatever course they choose. Whatever line they choose. 
Check out the courses that are open for enrollment: 
If you are interested in corporate governance, you should check out the diploma in Companies Act, Corporate Governance and SEBI Regulations;
If you want to get that in-house counsel job, go check out the diploma in Business Laws for In-House Counsels;
If Industrial and Labour Laws interest you, go take a look at that diploma course;
The Intellectual Property, Media and Entertainment Laws will be booming in the coming times, if you’re inclined towards that career, check out that diploma course;
If you’re sure that your niche lies in M&A, Institutional Finance and Investment Laws (PE & VC transactions), go check out that course;
The Cyber Law, Fintech Regulations and Technology Contracts is in dire need of good young talent if that is what ticks for you, go check out that course; and
Every young lawyer should check out our diploma course in Advanced Contract Drafting, Negotiation and Dispute Resolution. 
Check out our other executive courses which can be helpful: 
We have a certificate course in Advance Corporate Taxation; 
You can also check out this course for Insolvency and Bankruptcy Code; 
If Trademark, Licensing; Prosecution and Litigation interest you, we have a course for that;
LawSikho also teaches Competition Law, Practice and Enforcement in a course;
Technology Contracts will be essential to every business in the future, you can check out that certificate course; and
Knowledge about Banking & Finance Practice: Contracts, Disputes & Recovery is essential for every BigLaw layer, you can check that out too.
LawSikho has created a telegram group for exchanging legal knowledge, referrals and various opportunities. You can click on this link and join:
https://t.me/joinchat/J_0YrBa4IBSHdpuTfQO_sA
Follow us on Instagram and subscribe to our YouTube channel for more amazing legal content.
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plentyshsed · 4 years
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h1ous213tonseo · 6 years
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What Happens Inside the Atom - Electrons and the Quantum World
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There might have been a stating which i discovered it to make true-"There need aid three sorts about persons in the world:. First-The particular case who make things happen.
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The thing that keeps the electrons sticking around those nucleus? Well, though you keep in mind those old saying 'like charges repel, Dissimilar to attract': electrons need a negative charge, and the core need An certain charge. The flipside for this will be that the electrons necessity vitality In they would will evade spiralling under the core. This might have been a standout amongst the fundamental inquiries In those start of the century: the place can this vitality hail from? those reply turns out to a chance to be exact counterintuitive: extremely little objects, in atoms, don't act like we hyundai houston might hope them to, and Rather take after those decides of the quantum planet. The expressions 'quantum' intimates separateness, What's more on account of the molecule we find that electrons are really confined should make toward sure separate energies - a electron Might bring an add up about vitality X, or an measure of vitality Y, in any case it can't have a vitality between X What's more Y. This decides out the electron starting with spiralling, on in place should spiral, those electron might need on experience the entirety array about energies the distance down with zero, also that is simply not honda dealership houston  permitted.
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The thing that would the opposite three numbers mean? the l Furthermore m numbers would 'rotational' quantum numbers Also they focus how the electron moves around the core. In the recent past scratch and dent appliances we demonstrate further, we must contribute for in turn significant law of the quantum world, alternately rather an admission: we can't really know the place precisely those electron will be. This will be should do for those acclaimed 'uncertainty principle' which i am indeed you have listened about, regardless of you don't know the thing that it intends. Done fact, those best we could would may be say 'Well, there's a x-percent possibility its here, An y-percent risk its there, An z-percent opportunity its some place else, et cetera.
'. That's at. At demonstrating those wtw5000dw area of an electron, a regular technique will be on draw a electron 'cloud', shading the cloud thickly in the zones the place the electron will be less averse on be, What's more daintily in the ranges the place it will be more improbable on a chance to be.
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joannemaly · 6 years
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'Perfect' sensors may be possible, but might not come to cameras
Fossum's team has created a prototype chip with a variety of pixel designs and readout methods. This included combinations with sufficiently low read noise to allow individual photons to be counted.
The future could include sensors that perfectly describe the light in the scene, that offer new computational possibilities and give film-like latitude in the highlights. And yet we may never see them in cameras, says father of the CMOS sensor, Professor Eric Fossum.
We spoke to Fossum shortly after he received, alongside three other pioneers of digital photography, the Queen Elizabeth Prize for Engineering for his work on CMOS sensors. But the topic of our conversation is the future, rather than his past achievements. He now leads a group working on what he calls Quanta Image Sensors (QIS) and has recently published a paper announcing a breakthrough using the same fabrication process used to make CMOS image sensors.
The perfect sensor?
The principle is to use nanoscale, specialized pixels, called 'Jots' to capture light at the level of individual photons. They work in a binary fashion: they've either received a photon or they haven't (as opposed to conventional sensors which accumulate the charge generated by lots of photons during exposure). These jots are read repeatedly to see whether another photon has arrived since they were last checked.
While Fossum is keen to stress that other teams are having some success in the same field (using a slightly different approach), his own team's work is looking very promising. The paper in the journal Optica shows the team's technology has been refined such that a 1MJot chip can be read 1000 times per second while still exhibiting sufficiently low read noise that it can distinguish between individual photons.
We can count every photon: you can't do any better than that
"The Holy Grail is no read noise," says Fossum: "so that the read signal is proportional to the signal as it arrived." And the team's latest paper says they've got very close to this, with noise levels so low that the sensor can distinguish between individual photons without getting confused by read noise. This opens up the possibility of cameras that could perfectly describe the light in the scene, even in near total darkness.
A mathematical model showing how noise levels (measured in the root mean square of the number of electrons), affect the ability to interpret small signals. The lower the read noise, the more accurately you can distinguish between individual values in the signal. Diagram from the team's paper in Optica
Eliminating read noise from the sensor wouldn't mean totally noiseless photos, since the randomness of the light being captured is a key source of noise, but it's the best any sensor can possibly achieve. "We can count every photon: you can't do any better than that," he says.
The paper, perhaps conservatively, says the technology could be suited to scientific, space, security and low-light imaging applications, but Fossum has clearly also been thinking about conventional photography.
A classic response
"Because it's binary in nature, its response is comparable to old photographic film," he says. "In film, when the silver halide was hit by a photon, it's reduced to a silver atom that isn't washed away [during processing]. If it's hit by two photons, it doesn't make any additional difference."
This ends up meaning that in bright regions of the image there are ever fewer unexposed silver ions as the exposure goes on. This, in turn makes it less likely that the last few ions will be hit by a photon, so it becomes increasingly difficult to fully saturate the system. The same is true for the tiny, binary Jots: as more of them become saturated, it becomes increasingly difficult to saturate the last few.
"The response is linear at moderate exposure but it trails off to give significant overexposure latitude. It's a pattern first observed by Hurter and Driffield in 1890," says Fossum: "they showed the same curve that we measure, experimentally, in our QIS devices."
Diagram showing the Jots' exposure response, in comparison to mathematical models of different read noise levels. Note the roll-off at high exposures, comparable to the Hurter Driffield response curves of photographic film. Diagram from the team's paper in Optica
"That has obvious interest both for still photographers who're used to shooting film and for cinematographers who're looking for that kind of response."
The use of such tiny pixels has other benefits, too: "Jots are below diffraction limits in size. This means the resolution of the system is always higher than the resolution of the lens, which means we never have to worry about aliasing." While the group's prototype sensors feature one million Jots, Fossum says their target is one billion.
Beyond conventional photography
Fossum isn't just thinking about photographic history, though. The tiny size and the approach of repeatedly reading out the sensor challenges the existing concept of single exposures. "At the moment we make motion pictures by shooting a series of snapshots. With QIS it's more like the reverse process," he says: constructing still images from precisely captured movement.
Professor Fossum has already been responsible for one revolution in photography: the invention of the CMOS sensor. In December 2017 he was awarded the Queen Elizabeth Prize for Engineering for his work.
Essentially, taking lots of short, sub-frames during an exposure gives you an extra dimension to your images: time. "If you take a single frame, you get a bunch of ones and zeros. If you take another, you quickly build up a cube of ones and zeros," Fossum says: "For example, if you shoot 100 frames at 1000 frames per second, you get a cube that's x pixels wide by y pixels tall, but also 100 frames deep."
This presents some interesting questions, he says: "What do you do with that data? How do you create an image from that very faithful map of where photons arrived?"
"You could choose a number of pixels in x and y but also in the time axis. If you wanted a very sensitive pixel in low light you could combine 10 x 10 Jots in x and y and then maybe combine the data from 100 frames: it's essentially like increasing the grain size in a more sensitive film."
Of course you can achieve something comparable to this in conventional digital photography by downscaling an image, but Jots allow greater flexibility, Fossum says: "your pixel size could vary between different parts of the image, so in some places you'd have bigger but more sensitive grains."
What is the object of photography? Is it artistic or an attempt to perfectly recreate the scene as it was?
The time component also opens up additional possibilities, he says: "if an object moves during these hundred frames, instead of adding all the values from the same location, you could add them at an angle that corresponds to the movement," so that all the pixels relating to the same object are combined. "We could take out motion blur or remove the scanning effect of a computer screen in video."
The idea of combining multiple frames in interesting ways is, of course, already becoming a core part of mobile photography, and Fossum says finding all the things that are possible is a challenge he is leaving for others: "From my point of view, we're building a platform for computational imaging, it's for others to develop all the ways to use it. A camera would have to take account of the new sensor capabilities."
But it'll ask interesting questions, he believes: "What is the object of photography? Is it artistic or an attempt to perfectly recreate the scene as it was? Some of the things we associate with photography are artifacts of the way we capture them."
Not the only future
With all this going for it, it might seem odd that Fossum isn't promising to deliver a second revolution in digital imaging. But, having devoted a career to developing technologies and teaching about the challenges, he's realistic both about the work left to do and the competition any product would face.
"What we've already achieved is wonderful. The next challenge is adding color [awareness], but I don't think that's going to be particularly problematic. Then there's power: we've shown we can produce a large chip that doesn't consume or disperse a prohibitively large amount of power. We're currently at around 27mW but scale it up by 1000 [to get to one billion Jots] and that's 27W, so we need to cut that by about a factor of ten."
His concern is more about the current state of the rival technologies: "In order to bring a new technology to replace the existing one, it has to be compellingly better in a number of ways," he says. "For a few niches, [our technology] is already compelling." But for photography, the bar is already set very high.
I don't want our startup to be another esoteric imaging product that fails to find a market
"CMOS technology is pretty awesome right now," he says, before almost embarrassedly stressing that he's not claiming the credit for this: "where it is today is the result of the input from thousands of engineers from different companies who've contributed towards where we are now."
Professor Eric Fossum pictured with Dr Jiaju Ma, one of the co-authors of the Optica paper and a co-founder of the spin-off company, Gigajot Technology.
But, for all his cautious words, Fossum is convinced enough by the technology's potential to have created a company, Gigajot Technology, with his co-researchers. "Finding a sweet spot in the market is a really important part of challenge. It comes back to the things I teach: 'who is your customer?' 'what is your market?' 'how are we going to get there?'"
"I don't want our startup to be another esoteric imaging product that fails to find a market," he says.
While it's by no means certain that QIS sensors will make their way into mainstream cameras, it already looks like the technology has tremendous potential for niches such as scientific measurement. This alone shows just how far the technology has come from Fossum's original idea. As he readily admits: "When we first started this project I wasn't even sure it could be made to work."
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