double lesson! helped me out with my math and my science exam
@viin11813 жыл бұрын
best physics teacher everrrrrrrrrr!!!!!
@nouranmahmoud5865 жыл бұрын
Oh god....you are amazing .... I do understand this lesson that was really diffcult before.....thank you
@MrLachlan12713 жыл бұрын
THANK YOU!!! My teacher has been trying to teach me this but he doesnt make it seem easy like you did. I think you will be my new physics teacher :)
@chaosforeverАй бұрын
great problem thanks
@afzalmohamad17157 жыл бұрын
really help a lot to understand it for more complex things... Thank you
@jemappellelanoosh174312 жыл бұрын
Khan for noble prize :))) u r amazing thx for ur help. This wasso useful
@ytimg6213 жыл бұрын
Thank you for doing what my lecturer and that third year uni student that runs the tutorials can't. Teach me physics.
@samkelebaloyi9673 Жыл бұрын
LOL
@AhsanHaider313 жыл бұрын
damn thats a very tall woman!
@MelvinPaulbrains6 жыл бұрын
Sal why not give some super interesting and quite difficult problems?
@KiberMath14 жыл бұрын
That was so cool!! I love your lessons!
@LAnonHubbard14 жыл бұрын
I paused and did this problem. I found the angle which as you showed was unnecessary. I had also forgotten about a² + b² = c², so thanks for that too. I also fluffed up at the end using cosine rather than tangent but that was just stupidity LOL. Nice little problem and great explanation.
@rajisamusideen32565 жыл бұрын
U are a great teacher
@inneruniverse1714 жыл бұрын
Thank youuuuuu Mr. Khan!
@boeing747200lr14 жыл бұрын
@armanfazli I can understand the excitement. Its like coming first in the class!! :)
@shivshankargupta20754 жыл бұрын
Sir you can take more such problem which could help me in competitive exam
@Gringorican5 жыл бұрын
you can figure out the incidence angle (theta 1) without finding the x distance by taking the inverse cos of 1.7/8.1
@manq21111 жыл бұрын
after learning basic vector trigonometry this is a scale 2 hard. learn vectors and basic trig for physics and you're good to go and of course u have to know n1sinØ1=n2sinØ2
@Tome4kkkk14 жыл бұрын
"this distance is" sounds funny :)
@l052_jeeveshpathak84 жыл бұрын
why it sounds so funny
@Jonnyc021311 жыл бұрын
bit strange that the adjacent side is shorter than the opposite side on that diagram which clearly shows its more than half the length
@frescamenzi80617 жыл бұрын
so interesting video
@jamestornea45203 жыл бұрын
so let me do that in a different color.... no, i wanna do it in a different color. this part made me laugh HAHAHA. Anyway I really appreciate this lesson.
@jdavis4175 жыл бұрын
What's that woman so angry about? She's got her very own laser-pointer, after all!!!! ;)
@anhkhoinguyen27210 ай бұрын
I forgot it’s a right angle triangle, so I used the cosine law to solve for the angle of incident and I used the sine law to solve for y 💀 Took me 10 years longer than if I were to just use SOH CAH TOA. But hey, I got the right answer in the end so it doesn’t matter.
@Sam-ir6iu8 жыл бұрын
theta 1 is 76 degrees btw
@angelsintahoe6 жыл бұрын
I got 77.88 degrees...final answer still worked out (about) the same...11.1756 or 11.18.
@khabbablamberghini42698 жыл бұрын
U ARE AWESOME
@tallis216 жыл бұрын
u just saved me
@LiamHorne014 жыл бұрын
Third comment, I'm amazing! lol. Good video Sal!
@sumitpal7636 жыл бұрын
Good video Sal
@alessandro.festuccia8 жыл бұрын
Nice lesson. So the woman is about 2 meters tall? ;P
@carllinder-lood46865 жыл бұрын
This is amazing.
@SillyGeneva9 жыл бұрын
If it was a laser pointer...wouldn't it just bend again and go straight into the water without having an angle of refraction at all? Because a laser is just light??
@younguzithug14 жыл бұрын
First Comment. Finally!
@prem24697 жыл бұрын
nice'
@prem24697 жыл бұрын
really nice yar
@prem24697 жыл бұрын
yes
@boofaloof10110 жыл бұрын
Maybe its just me.. but i have a feeling that the math is incorrect when he divides both sides by n(water).. he has it as dividing directly by n(air). But i believe by algebra rules he has to to divide it by the whole quantity on the left side of the equation so in other-words it should be (n(air)(O/H))/n(water) instead of n(air)/n(water) x O/H.. I could easily be wrong but i just want to check! thanks!
@keivwangz10 жыл бұрын
It's the same thing! Multiplication and division has the same priority, so it doesn't really matter which one you do first if there isn't any brackets present. If you would multiply the O/H with the n(air) before dividing n(air)/n(water) you would get (n(air)(O/H))/n(water)!
@ActuallyAudacity9 жыл бұрын
keivwangz For your kind information it does matter. This is because of the BIDMAS rule in which you divide first and then multiply so it does not have same priority. Division is prioritized more than multiplication.
@icemilo15939 жыл бұрын
Arka Roy Yea but division is the same thing as multiplication i.e. fractions. So if you convert all the things that are divided to a fraction then you can multiply.. e.g. (1 divide 2 x 3) is the same as ( 1/2 * 3 ) so you multiply 3*1 first then divide 2 or you could do it the other way 1/2 = 0.5 * 3 = 1.5
@ActuallyAudacity9 жыл бұрын
Ice Milo Yeah...
@owned2death12 жыл бұрын
On a scale of 1-10 where 10 being the hardest, how hard is this question?
@IncredibleEtableBaby7 жыл бұрын
This is a 3
@benjaminsafari74494 жыл бұрын
I kinda feel like y should be smaller that the adjacent