Archive
10th of March 2017
Physics
Q:

A ray of light travelling in air falls on a transparent medium of refractive index 1.6.The incident ray makes an angle 53 with the normal.What is the angles of refraction in medium?

Nisha_vini29 - CBSE - Class X

Friday, March 10, 2017 at 14:15:PM

A:

begin mathsize 12px style Hi space Nisha comma
According space to space Snell apostrophe straight s space law comma
sini over sinr equals straight n subscript straight r over straight n subscript straight i equals straight n subscript straight r space space space space space space space space space space space space space space space space space space space space space As space straight n subscript straight i equals 1 space for space air
therefore sinr equals sini over straight n subscript straight r equals fraction numerator sin 53 over denominator 1.6 end fraction equals fraction numerator 0.799 over denominator 1.6 end fraction equals 0.5
therefore straight r equals sin to the power of negative 1 end exponent 0.5 equals 30 degree end style

Friday, March 10, 2017 at 18:27:PM