Spin of an Electron: Why "Spin Up" and "Spin Down"? | Quantum Physics for Beginners @ParthGChannel

Parth G | Spin of an Electron: Why "Spin Up" and "Spin Down"? | Quantum Physics for Beginners @ParthGChannel | Uploaded December 2019 | Updated October 2024, 1 week ago.
What is Spin? And what is the Spin of an Electron?

Hi guys, I'm back with a new video, all thanks to a brilliant comment on my previous one :) In this video, I wanted to discuss what the spin of an electron is, as well as why we call the two possible results of a spin measurement are called "Spin Up" and "Spin Down".

Spin is inherent angular momentum that a particle has, which comes about when we consider Quantum Mechanics together with Special Relativity. The reason it's called Spin is because this is angular momentum that a particle has AS IF it were spinning.

In my previous video I explained that quantum states can be represented as vectors in some abstract vector space ("Hilbert space") because there is a vector-like relationship between different quantum states in this space. But in order to represent them as vectors, we had to say that the "Spin Up" vector was at right angles to the "Spin Down" vector. John Pawlicki commented asking why we don't just call the two Spin states "Spin Up" and "Spin Right". It's a great question, so I wanted to explain exactly why we couldn't do that.

I hope you enjoy the video! If there's something unclear or if I made a mistake, do let me know in the comments below. Follow me on Instagram for my day-to-day shenanigans and vlogs - @parthvlogs

Why Real Atoms Dont Look Like This - Quantum Numbers to Understand Atomic Structure by Parth G

The Meaning of Energy? Core Physics Principle Explained by Parth G

$Parth G Channel Update | Whats Next?! Ive started a second YouTube channel! Hey everyone, this weeks video is a little bit different to what I usually upload - its just a quick update video. First of all, Im working on a video explaining the basics of Diffraction, which should be out next week. Im also going to be trying to make the most of being stuck at home by studying some more physics again. But the main announcement I wanted to make was that Im starting a second channel! This is where Ill be posting everything music related, such as original music and snippets of covers. I really enjoy making music and Ive needed an avenue to publish everything I do publicly, for a long time. The channel is called Parth Gs Shenanigans and you can find it here: https://www.youtube.com/channel/UCLneiIR_ivuWYuJzGVRoZLA Please head over and subscribe if youre interested in progressive metal / djent / Indian classical / fusion music. I also want to start making some reviews of music that my favourite bands put out, so head over there if that sounds like something youd enjoy. Also follow me on Instagram @parthvlogs In the meantime, I hope youre all coping well with the recent outbreak. Ill see you very soon.$

How Mass WARPS SpaceTime: Einsteins Field Equations in Gen. Relativity | Physics for Beginners

$Our Biology is to Blame for Virtual Images... Not Physics - Parth G Explains Optics This is why Virtual Images need to be studied! Its as much biology as it is physics. Hi everyone, Im back with another video on a topic that I used to find tricky when I first studied it. Were discussing how real and virtual images are formed, as well as what the difference is between them, and why virtual images even exist. I decided to go about looking at this topic by considering the light passing through a convex lens. We see three rules that an ideal (thin) convex lens must obey: 1) Any light passing through the lens focal point and then through the lens will be refracted so it moves parallel to the optical axis on the other side. 2) Any light entering the lens while moving parallel to the optical axis will be refracted so it moves through the focal point on the other side. 3) Any light passing through the absolute centre of the lens will not change direction. These three rules are simplifications that dont quite apply to real lenses, but they are very good approximations and make our understanding much clearer too. Incidentally, we can apply similar logic when studying concave lenses, as well as convex and concave mirrors. But each of these has their own set of rules as dictated by their geometry. We see how an object placed further than the focal point of a convex lens will have its light refracted such that an inverted real image is formed on the other side of the lens. We also see that this image is formed by the actual convergence (meeting) of light rays coming from the lens. Therefore, if an observer were to place their eye where the rays of light focus, they would see an image of the object. Additionally, if we were to place a screen at that same point, an inverted image would be projected on that screen. If we now consider an object placed closer to the convex lens than its focal point, then the rays of light passing through the lens are refracted in such a way that they will never meet on the other side. The light rays are said to diverge, and not converge. So it seems they will not form an image. However, our brains are very interesting organs. When converging rays of light enter our eyes, our brain will interpret them as if emerging from a point source. In other words, our brain will trace the rays of light back to a supposed source. This means that what we end up seeing is an image of the object, that is often bigger than the object, and seemingly further back too. This is known as a virtual image. Its important to note that a virtual image cannot be projected on a screen because its not formed by the convergence of light rays. Its more a projection created by our own brains. In other words, the reason we study virtual images and not just real images, is because biology is very interesting and our brain imagines light rays as if moving through air, rather than through the lens which changes the path along which they travel! Thumbnail Image Credit: Paul Skorupskas Timestamps: 0:39 - The Properties of Convex Lenses 2:40 - How Physicists Study Image Formation in Optics 3:29 - Real Images: Converging Light Rays 6:07 - Virtual Images: Diverging Light Rays 7:19 - Why We Study Virtual Images At All (Hint: Ask the Biologists!) Thank you so much for watching, and for your wonderful support. Please check out my socials: Instagram - @parthvlogs Patreon - patreon.com/parthg Some of you have asked about the equipment I use to make these videos, so here are my Amazon Affiliate Links - I get a small commission if you click through and purchase something on Amazon :) My camera (Canon EOS M50): https://amzn.to/3lgq8FZ My Lens (Canon EF-M 22mm): https://amzn.to/3qMBvqD Microphone and Stand (Fifine): https://amzn.to/2OwyWvt$

Uniqueness: The Physics Problem That Shouldnt Be Solved

Imaginary Time: Stephen Hawkings Favorite Physics Concept Relativity by Parth G

Physicist Reacts to asdfmovie - Its BOFFIN Time - Analyzing the asdfverse with Science

Physics Diagrams That Suck (Quantum Mechanics) | When Physics Goes Wrong Ep.1

The Planck Constant in 60 Seconds - Quantum Physics Most Important Universal Constant #shorts

The Mathematical Bridge That Links Two Completely Different Neighborhoods of Physics