Parth G | Study With Me Physics Edition + Motivation to Study @ParthGChannel | Uploaded 5 years ago | Updated 2 hours ago
This is how I study Physics!

Hey everyone, I'm back with a Study With Me video - this was requested by some of you guys so I thought I'd make it as they're usually a lot of fun to film and I haven't done one in a while.

This a slightly different Study With Me to normal, because I don't technically HAVE to be studying - I'm just doing it for fun, and because I miss learning physics. I made a whole video about this fairly recently, as well as giving you my best physics study tips. Check it out here: https://www.youtube.com/watch?v=bZLKG43Qcps

I also decided to record a little voiceover, spilling my thoughts on various different things - studying, and looking after yourself, and what I've gotten better at over the past year. That final point is what my Weekly Question of the Week is based on this time! Tell me down in the comments below what you've gotten better at over the past year. It's always nice to stop and look back at everything we've achieved, given that a lot of us are always just looking forward at how much we still have left to do.

I also have been thinking recently about how I want to be constantly improving at physics as I go through life - there's now no obligation for me to be amazing at physics, since I'm no longer a student or in academia, but this means that I can take it at my own pace and really enjoy the learning process. So now I'll be perfectly happy if I can do some studying once or twice a week, and continue this for a long long time to come. I have no intention of completing lots of courses just for the sake of it, and burning out and starting to dislike physics again. I hate to say it, but this did start to happen during my time at uni, as rewarding as it otherwise was.

Anyway, I've also had a bit of a break from social media. Hence, this week's video is fairly short and just a chill one, but I'll be getting back to making proper videos pretty soon. In the meantime, I hope you enjoyed this video. If you did, leave a thumbs up and subscribe to my channel! Also follow me on Instagram (@parthvlogs) where I post minute-long physics videos, and Twitter (@parthvlogs) where I make the worst physics jokes of all time.

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$Diffraction: Why Does It Happen? (Physics Explained for Beginners)$ $Relativistic Momentum and Common Sense - Why Physics Theories are Counterintuitive Momentum in Classical Mechanics looks different to Momentum in Special Relativity. But why is that? Hey everyone, Im back with another video! This time were using Relativistic Momentum, and Classical Momentum, as examples to talk about why certain tricky to understand theories (e.g. Relativity and Quantum Mechanics) happen to be the best descriptors we have right now of the universe. Firstly, lets start with the basic idea that classical physics is generally considered intuitive to most people. The objects described by this branch of physics end up behaving like our day-to-day experiences, and our expectations, tell us they should. But classical physics famously breaks down when considering objects moving at large velocities. Anything that moves at a considerable fraction of the speed of light needs a relativistic description. And special relativity really is mind-bending, introducing ideas that dont make intuitive sense to most people, such as the constancy of the speed of light, time dilation, length contraction, etc. But heres the thing: before the advent of relativity, humans were not used to very fast-moving objects. So we did not have a good grasp of how objects should behave at those speeds, or even the fact that the speed of these objects made any difference. Interestingly, when we consider the expression for (special) relativistic momentum, we know that its a good descriptor of the motion of objects moving at all speeds. And when we consider the motion of objects at speeds that we are used to in day-to-day life, we find that the special relativistic momentum expression actually reduces to the classical expression. In other words, at low velocities, classical and relativistic momentum looks the same! This is why classical physics derived the equation that p = mv (momentum = mass x velocity), rather than p = mv/sqrt(1-(v/c)^2), where c is the speed of light, taken to be a constant in relativity. This kind of logic is used as a little test for many complicated theories by the way. If any theory is a complicated and counterintuitive one, we can ask the question. does our theory reduce down to classical physics under the right conditions?. This is because in these specific conditions, classical physics is indeed a good description of the universe. So our weird new theory agreeing with this is only a good thing. If the two theories disagree, then this is not a huge problem - we need to try and work out why. When we apply this logic to quantum physics, a principle known as the Correspondence Principle pops up. In the limit of large quantum numbers, quantum systems must look like classical systems. In simplified terms, quantum mechanics describes very very small systems excellently. And this behaviour, when extended to much larger systems, must agree with the behaviour that we happen to observe - distinctly classical behaviour, which is why we came up with classical mechanics in the first place. I also wanted to use a nice little analogy to represent our understanding of the universe from a classical perspective, and how subsequent mind-bending. weird theories encompassed classical physics and yet described even more of the universe. So I put in some trains! Thanks for watching this video! If you enjoyed it, please do hit the thumbs up button and feel free to subscribe. Check out my second channel here: https://www.youtube.com/channel/UCLneiIR_ivuWYuJzGVRoZLA Follow me on Instagram @parthvlogs. Ill see you soon!$

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