Question

define the following1) angle of incident 2) angle of refraction 3) refractive index 4) snell's law of refraction 5)angle of emergence 6) angle of deviation of the prism

Answer 1

1.the angle which an incident ray makes with the normal at the point of incidence is known as angle of incidence.2.the angle made by a refracted ray with a perpendicular to refracting surface.3.the ratio of speed of light in a vacuum to the speed of light in a given medium.4.it is a law in physics that defines that the ratio of sine of angle of incidence and refraction is a constant.5.it is the angle between the emergent ray and the normal.6.the angle of deviation through a triangular prism is defined as the angle between the incident ray and the emergent ray.

Answer 2

The ratio of sine of angle of incidence to the sine of angle of refraction of light of given colours is constant for a given pair of media is snell's law
The angle which the emergent ray makes wid the incident ray is known as angle of deviation.