Question

Define the following terms :

Incident ray, Refracted ray, Angle of incidence, Angle of refraction.

Answer 1

INCIDENT RAY AB: The ray light AB which is in air strikes the glass slab at B. Or “A ray of light falling on the surface separating the two media.” 

REFRACTED RAY BK: A ray of light which after passing the first medium is in second medium i.e. ray BK. “A ray of light traveling in another medium in the changed direction.” 

ANGLE OF INCIDENCE: “The angle which the incident ray makes with the normal is called angle of incidence.” i.e. ∠i 

ANGLE OF REFRACTION: “The angle which the refracted ray makes with the normal is called angle of refraction.” i.e. ∠r