Question

A ray of light travelling through air falls on the surface of a glass slab at an angle i. It
is found that the angle between the reflected and the refracted rays is 90°. If the
speed of light in glass is 2 x 10 m/s, find the angle of incidence.

I have the solution I needed explanation. ASAP​

Answer 1

Answer:

If carbon tetrachloride has an index of refraction of 1.461, what is the speed of light through this liquid? (c = 3 x 108 m/s)

a. 4.38 x 108 m/s

b. 2.05 x 108 m/s

c. 4.461 x 108 m/s

d. 1.461 x 108 m/s

Answer: B

Use the equation v=c/n where n = 1.461 and c = speed of light in a vacuum (3x108 m/s).

Answer 2

Answer: 56.30

Explanation:

Since, μ=  speed of light in medium  / speed of light in vacuum

​ μg  =  2×10^8  / 3×10^8

      =1.5

r = 90 − i

Hence from Snell's law,

μ1sini = μ2sinr

1sini=  3/2sin(90−i)

tani=  3/2

i=tan^−1(3/2)

i =56.30

​Enjoy it... I solved it for you beabs ;)