Question

In case of refraction,if the angle of incidence and the angle of refrerection are 45 degree and 30 degree respectively , then the angle of deviation is
(a) 75 degree ( b) 15 degree
(c)7.5 degree ( d)37.5 degree

Answer 1

Angle of deviation is

Angle of incidence - Angle of refraction

i. e. 45-30=15 deg (b)

Answer 2

Dear Student,

● Answer -

(b) 15°

◆ Explanation -

# Given -

r = angle of refraction = 30°

i = angle of incidence = 45°

δ = angle of deviation = ?

# Solution -

During refraction, i, r and δ are related by formula.

δ = i - r

δ = 45° - 30°

δ = 15°

Hence, angle of deviation during refraction is 15°.

Thanks dear. Hope this is helpful to you...