Question

ray of light is incident on a glass slab at an angle of 45 degree and refractive index of glass is 1.6 find angel of refraction

Answer 1

The formula is

ni × sine (Θi) = nr × sine (Θr)

where,

ni = index of refraction of the incident medium (Taken Air in this case)

nr = index of refraction of the refractive medium

Θi = angle of incidence

Θr = angle of refraction

1.00 × sine (45) = 1.6 × sine (Θr)

0.7071 = 1.6 × sine (Θr)

.441 = sine (Θr)

sine-1 (0.441) = sine-1 ( sine Θr)

Θr = 26°

Angle of Refraction = 26°