Physics Lec 1 : Snell's Law | Jain University

[Music] let's see the U.S ambassador to India [Applause] so the first thing I'm going to be talking about today is light so can any of you give me just a short quick one sentence definition what is light anyone just raise your hand uh can you say it a little louder okay well good enough so hey we're just going to be talking about how light acts the way I'm showing surfaces and what we know is mediums which are basically substances to like travel stream so I know to show you two surfaces and just tell me what light is doing or for each of them so I'm just gonna draw this and that so um okay and what is happening over here okay so can anyone hear the following reflection of reflection for me oh uh can you say it louder okay well that is true it stays in the same medium before and after it hits the surface but can any of you tell me the relation between the angle of incidence and the angle of reflection equal okay good so now uh let's draw the normal line here huh yes this is bending of light good figured that out a while ago so this is the ending with incidents and this is the annual reflection the relationship between these two night night okay oh from what I'm hearing you guys are talking about Snow's law so the end of the first the okay uh the index of refraction of the first material or the first medium which is basically how fast like moves through one of them and oh yeah of course uh and one sign Theta I is equal to N2 the how fast light travels through the second surface all right so can anyone tell us what Theta R here it's a basic algebra you should be able to do it anyone here can solve for Theta r just come up here you don't need to raise your hand no one is enthusiastic about this [Music] well I'm not going to move on until one of you come up here foreign just come up here you don't need to raise your hand [Music] no one is enthusiastic about this [Music] well I'm not going to move on until one of you come up here thank you anyone want to come up here do it you guys oh my God I don't have to do this myself sorry huh oh okay anyone please this is being casual you guys should be able to do this none of you know how to solve this equation for days okay whatever I'll just do it for you this is disappointing I don't want to over N2 selling Theta I equals sine Theta r so Theta R equals inverse sine of N1 over N2 sine Theta I see who's that symbols okay whatever so this is the equation we are going to be using

Channel: Bari Science Lab

Views: 2,508,739

Keywords: Brilliant, Math, Science, STEM, Physics, Calculus

Id: c39lsTXojXc

Length: 6min 5sec (365 seconds)

Published: Mon Apr 17 2023