Question

According to laws of refraction, refraction of light at the boundary between two different regions follow:

• A. that the incident ray, the normal at the point of incidence and the refracted ray, all lie in the same plane.
• B. that for a given pair of media and given colour of light, the ratio of the sine of angle of incidence to the sine of angle of refraction is constant.
• C. both A and B
• D. neither A nor B

Answer 1

Answer: (C)

both A and B

Refraction of light obeys the following two laws:

1. The incident ray, the normal at the point of incidence and the refracted ray, all lie in the same plane.

2. For a given pair of media and given the colour of light, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is constant.

The second postulate is also known as Snell's Law which is as:

$\frac{sini}{sinr}=\frac{n_2}{n_1}$= $constant$