Question

A student has performed the experiment of glass slab and with different angles of incidence measured the angles of refraction and emergence in each case. He recorded his observations in the following table :-

Angle of incidence Angle of refraction Angle of emergence
A 30 25 30
B 40 42 40
C 50 50 50
D 60 60 62

Answer 1

Hey Friend,

In the experiment to trace the path of a ray of the light through glass slab -

a] It is observed that the angle of refraction (r) increases with the increase in the angle of incidence (i)

angle of incidence is directly proportional to the angle of refraction.

b] It is observed that the angle of incidence (i) is equal to the angle of emergence (e)

Due to experimental errors, the angles may not be same but are nearly or approximately equal.

Hope it helps!