Visit ilectureonline.com for more math and science lectures! In this video I will find angle=? of the exiting light beam of a prism.
Пікірлер: 116
@dadasemilorelydia57053 жыл бұрын
I thought no other tutor could ever explain better than the organic chemistry tutor....but you are one of a kind sir💯💯
@MichelvanBiezen3 жыл бұрын
Happy to help
@CoolittleProductions4 жыл бұрын
THANK YOU SO MUCH. This made so much more sense after you went step by step and showed which angles were relative to which normal.
@MrDivad0069 жыл бұрын
The video is 1st class, excellent explanation and the quality of the overall video is just wow.
@nancym1430 Жыл бұрын
After doing these calculations a few times, I noticed that for a 60 degree equilateral prism, the two angles inside the prism (theta 2 and theta 3) add up to 60. Nice little shortcut for equilateral prisms--less geometry!
@MichelvanBiezen Жыл бұрын
That is a good shortcut. We like to show the general method that works in all cases.
@tnowroz7 жыл бұрын
Thanks, this is by far the best prism lesson I've found :)
@aiyanapatel5862Ай бұрын
just about to take my aqa A level physics exam tomorrow and came across your workthroughs for difficult refraction and TIR problems, just what i needed! been stuggling on more complex ones like these for a while and you have helped me alot with this topic! a big thanks to your physics and mathematics playlists, cant wait to see more vids in the future!
@MichelvanBiezenАй бұрын
All the best on your exam.
@minyo807 ай бұрын
thank you so much i watched a lot of videos and none of them explained it like you did! i understand now
@MichelvanBiezen7 ай бұрын
Glad it helped! 🙂
@mhrz90367 жыл бұрын
How do I find the angle of Theta3 if the prism is not equilateral?
@MichelvanBiezen7 жыл бұрын
The technique would be the same. I probably should add a few more examples. This playlist may help: PHYSICS 51 LIGHT REFLECTION
@jtotherock72443 жыл бұрын
This is challenging! I rewatched twice to fully understand. What is difficult in my opinion is knowing to replicate the horizontal beneath the refracted light once more and knowing it is also 30 degrees because it was the angle between the medium and horizontal coming in on the left side, then adding the 5.7 degrees to that because of the reflected angle.
@FliegendreKK7 жыл бұрын
What should I do if theta 3 is about 40° or bigger? with that IOR, 1.56 * sin(40°) = 1.002... => arcsin from something > 1 isn't possible. Is there a different approach?
@MichelvanBiezen7 жыл бұрын
Then there will be total internal reflection on that boundary and the ray will not leave the prism at that location.
@mumujibirb Жыл бұрын
cool fact:If you transpose the light beam such that the normal entry line intersects with one corner of the prism, you can apply angle sum of triangle twice to find the 35.7 deg
@MichelvanBiezen Жыл бұрын
Great input! 🙂
@tougniawilde10942 жыл бұрын
prof Biezen you are the best
@MichelvanBiezen2 жыл бұрын
Glad you are enjoying our videos. 🙂
@tachipiwasango7300 Жыл бұрын
Sir has helped me to a greater extent
@MichelvanBiezen Жыл бұрын
Glad to hear it. 🙂
@tachipiwasango7300 Жыл бұрын
@@MichelvanBiezen all your physics videos actually interpret my syllabus 😊
@user-jn8nt6ww8m7 жыл бұрын
thank you for all your great lessons! do u have a lesson for Angle of devitation?
@MichelvanBiezen7 жыл бұрын
No we don't. We will add it to the list of topics to cover.
@robertnagy39422 жыл бұрын
theta sub 2 + theta sub3 = deviation angle, in this case 24.3 + 35.7 = 60, sorry 5 years late
@anukrutisingh27438 жыл бұрын
Does the normal always make an angle of 30 degrees with the horizontal??
@MichelvanBiezen8 жыл бұрын
Only in this case where we have a prism with a 60 - 60 - 60 angle arrangement. With a different prism, the direction of the normal to the surface will be different.
@anukrutisingh27438 жыл бұрын
Michel van Biezen Ok.. Thank you sir.. :)
@zaidfanek26102 жыл бұрын
What should you do if nsin(theta) is greater than 90.
@MichelvanBiezen2 жыл бұрын
Depends on which "n sin(theta)" you are referring to. If you are referring to the exiting ray, then you'll have internal reflection. (see the videos on total internal reflection)
@eyadfromthesky4 жыл бұрын
You are a great teacher and person! Thank you
@MichelvanBiezen4 жыл бұрын
We appreciate the comment.
@zahraaulya33857 ай бұрын
thank you very much sir for the video I understand after seeing this video but I have a question 1,56where did you get it from? Thank you in advance sir 🙏🏻
@MichelvanBiezen7 ай бұрын
That is a given. The index of refraction of glass varies from about 1.5 to about 1.6
@samtoh75367 жыл бұрын
thank you so much for the great guide,couldnt find any better than this
@isuggest_clorox24596 жыл бұрын
Do buggy high by for her that end
@DonLloydi9 жыл бұрын
4:30 I have a question. How'd you know that broken line was the normal in the other side? Is it just a perpendicular line with respect to the normal line in the left side? Thanks.
@alecrosewell69597 жыл бұрын
parallel to the first normal
@ayushgupta39877 жыл бұрын
i still don't get , how you find third angle
@stevendusseau44407 жыл бұрын
Requires geometry by knowing that a right triangle is 180 degrees. The video over-complicated it for this problem, IMO.
@jaredindar31366 жыл бұрын
listen its not that hard .angle 3 u just add the thirty degrees plus the angle below the horizontal (5.7) amd u get ur answer
@nicolezhang81164 жыл бұрын
How did you know what angle theta sub 3 was?
@MichelvanBiezen4 жыл бұрын
Draw 2 parallel horizontal lines. One that cuts through the entry point on the left side and one that cuts through the exit point on the right side. Then you can find the angle 3 by making the correct comparisons.
@vikasharsh29716 жыл бұрын
sir you are awesome you are amazing you explain concept in a very easy way you are great sir hats of to you
@cathyguan21992 жыл бұрын
THANK YOU SO MUCH!! this makes so much sense after you went through it step by step, I will never figure this out by my own :(
@MichelvanBiezen2 жыл бұрын
Glad it helped! Once you see the "trick" of how to look at the angles it becomes easy,
@paulobatitay93623 жыл бұрын
How did you find out the 10 degrees and 30 degrees on the angle of incidence?
@HaleTruman8 ай бұрын
Im sure you figured this out by now but I had the same issue. For anyone new: the line perpendicular to the surface has one 90 degree angle. then if you draw a line perpendicular to the bottom of the triangle you can use a combination of complimentary and supplementary angles to validate the 30 degrees. 10 degrees is given.
@aliasqar53798 жыл бұрын
thanks
@Turah_Paak3 жыл бұрын
Many thanks!
@MichelvanBiezen3 жыл бұрын
Many welcomes!
@chrisjobe22707 жыл бұрын
How did you get n1 to equal 1 and n2 to equal 1.56?
@MichelvanBiezen7 жыл бұрын
n1 is the index of refraction outside the prism and n2 is the index of refraction inside the prism
@HaleTruman8 ай бұрын
Different materials have different properties. google "index of refractions". Example: Water N2=1.33 Epoxy N2=1.55
@rodericksibelius84722 жыл бұрын
This is the reason why we must always review the BASICS of Geometry and Trigonometry.
@MichelvanBiezen2 жыл бұрын
Knowing geometry and trigonometry well helps immensely with these types of problems.
@djordjenikolic13277 жыл бұрын
Theta2 + Theta3 is always equal to the top angle of the prism right?
@MichelvanBiezen7 жыл бұрын
That appears to be correct. A good way to check is to let the top angle go to zero and then to 180 degrees to see if that holds true.
@ThuHuyen-qw9nn7 жыл бұрын
Very clear. Thank you Sir
@tahirabubakarumar36353 жыл бұрын
Wonderful video
@MichelvanBiezen3 жыл бұрын
Many thanks
@nick55ification4 жыл бұрын
how can we theoretically prove that the 24.3 degrees is above the normal rather than below it? I only know this from experience.....
@nick55ification4 жыл бұрын
I think I get why it bends either towards or away from normal now. Got to do with Maxwell's law
@beeahmed26488 жыл бұрын
That's amazing! Thanks
@amanmohamed81224 жыл бұрын
thanks sir ur epic
@avak77307 ай бұрын
sooo helpful
@MichelvanBiezen7 ай бұрын
Glad you think so! 🙂
@samwaw8 жыл бұрын
What is N1 and how did you calculate N2?
@MichelvanBiezen8 жыл бұрын
+Prof. Some Ting Wong I use the subscripts 1 and 2 for the left side and right side of the first boundary. Thus n1 is the index of refraction of the left side (air) and n2 is the index of refraction of the right side. (glass)
@gokulkurup15847 жыл бұрын
that was slightly unclear but thanks for a very detailed presentaion otherwise.This clarified most of my doubts on this topic :-)
@danijelpupek70112 жыл бұрын
Great video! Now I finally understand it.
@MichelvanBiezen2 жыл бұрын
Glad it helped!
@sharonndungu4805 жыл бұрын
this is awesome thanks a lot teacher
@Kimi-vn7jz5 жыл бұрын
The angle between two lines is the same as the angle between their normal right?
@MichelvanBiezen5 жыл бұрын
Why don't you draw two lines with an angle of 150 degrees between them. Then draw the normal lines and determine the angle between them. You may be surprised with the result. (It actually depends on which angle you are looking at).
@didyouforgetalready Жыл бұрын
I'm doing my gcses in less than 40 days wish me luck!! I really need to :D
@MichelvanBiezen Жыл бұрын
Not sure what that is, but good luck! 🙂
@nadaouahabi82194 жыл бұрын
is there a way to find the result without using a calculatrice ?? btw thanks for the explanation god bless youu
@rrni23438 жыл бұрын
I know it's not relevant, but, he sounds exactly like Gru from Despicable Me.
@yizh85 Жыл бұрын
Thank you sir❤
@MichelvanBiezen Жыл бұрын
You are welcome. 🙂
@sazzathossain77682 жыл бұрын
Thanks a lot
@MichelvanBiezen2 жыл бұрын
Happy to help
@brfisher11234 жыл бұрын
Isn't the wavelength of the electromagnetic wave (light) also a factor of the angle of refraction?
@MichelvanBiezen4 жыл бұрын
You are correct, the angle of refraction does depend on the wavelength.
@labelable24424 жыл бұрын
you are truly great
@ayushgupta39877 жыл бұрын
i mean how you get 30, in theta3 = 30 + 5.7
@MichelvanBiezen7 жыл бұрын
Since it is an equilateral triangle all the interior angles are 60 degrees. 60 + 30 = 90 A line perpendicular with a side will make a 30 degree angle with the horizontal.
@sakhawathosain83453 жыл бұрын
Thanks
@MichelvanBiezen3 жыл бұрын
Welcome
@costinceciu9 жыл бұрын
thank you!
@hamidthephysicist63764 жыл бұрын
Thank you very much . very helpful
@DrBoomx5 жыл бұрын
thanks a lot mate🙏🙏
@fernandojose19963 ай бұрын
Better explained impossible, congrats
@MichelvanBiezen3 ай бұрын
Glad you think so!
@melissadavis71324 жыл бұрын
What happens if the lens is deceptive ? If the lens is deceptive...the entire theory and answers to the theory would be incorrect....right ?
@MichelvanBiezen4 жыл бұрын
What do you mean by "the lens is deceptive"?
@melissadavis71324 жыл бұрын
@@MichelvanBiezen ....our eyes see things that are not realty. For instance....the ship that slowly starts Dissapearing from the horizon....you think it is starting to go down the curvature of the globe. In reality, if you look thru a pair of binoculars the ship is still there. Our eyes can only see so far and we see with a point of perception. We have based how we see things with lens....windows, cameras, etc. Things naturally appear curved. This deception are what a lot of theory's are based on. We look through a telescope and gases that are in the upper stratosphere appear to be globular and isolated. But it just is not so. Continuum....space continuum is Truth. We can measure east to west, and yes we hit an invisible something g that stops us from moving forward. North and south are a different story. From the north and south pole if we continue forward, we are under the same sky, no black outer space. Same oxygen and we just keep moving north we are under the sky with land, vegetation, water. Sounds crazy but Admiral Byrd reached a land mass bigger than the USA about 1,700 miles south of the south pole. And it continues....no ends found yet going north and south.
@MichelvanBiezen4 жыл бұрын
If you keep track of the ship, you will see that the bottom part of the ship disappears while the top part is still visible. As the ship continues to move farther away less and less of the ship will be visible.
@melissadavis71324 жыл бұрын
@@MichelvanBiezen ....I wish I could tell you that is true but it simply is not. Depending on how good your binoculars are or how good your telescope is, it never disappear...no part of it. It just gets smaller. I used to believe this place was a globe until I witnessed it with my own eyes. I had forgotten about "point of perspective" !!! It blew my mind...I felt numb and when the shock wore off...I started researching. Now I believe we live on a flat plain . I Love Jesus and there are hundreds of scriptures that say it's flat. When God said, " the Earth is immovable". Well.....then there was the video with Admiral Byrd saying that he went 1,700 miles south of the south pole and hit a land mass bigger than the united states. Then the sealer was a book called, "worlds beyond the poles". It will blow your mind.
@GREENFucka Жыл бұрын
I did have to put the video on .75.
@MichelvanBiezen Жыл бұрын
Yes, I used to talk a bit too fast. (Trying to slow down). 🙂
@dds20798 жыл бұрын
Why would you bother to keep track of the angles' relations to the "horizontal"? It is just as irrelevant as the "base" angles! If you don't have enough points of reference, why not add the North Star or the direction to the bathroom? It seems that the hypothesis is not about refraction, but the refraction on a specific prism on somebody's horizontal desk
@stotty01915 жыл бұрын
This overcomplicates Snell's Law completely
@oxpie2 ай бұрын
Then this video is not meant for you, there are beginners friendly videos too
@gedeaocabele91008 жыл бұрын
not very clear to find the angles
@ironuranium39276 жыл бұрын
how angle 2 and angle 3 can be different?
@MichelvanBiezen6 жыл бұрын
Because the opposite sides of the prism are not parallel.
@alexplastow94966 жыл бұрын
bowties are cool
@shanesimms1691 Жыл бұрын
why bother talking about the horizontal line so much when angles of a triangle can be calculated with more basic rules... convoluted explanation..
@MichelvanBiezen Жыл бұрын
I am sure that there are several other ways in which you can explain how to solve this problem. It has been my experience teaching this topic for a very long time, that students learn better with a particular method. That said, no method will be ideal for all students.
@sdy02Ай бұрын
bantikive vurum
@eliasmbute66199 жыл бұрын
nice lesson teacher but the video not clear.........like your exeplanation
@frankdimeglio82167 ай бұрын
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