Question

ii. If we gradually increase the angle of incidence of a ray of light passing through prism
then …..
a) Angle of deviation goes on decreasing.
b) Angle of deviation decreases but after certain value of incident angle, deviation
angle increases
c) Angle of deviation goes on increasing.
d) Angle of deviation increases but after certain value of incident angle deviation angle
decreases.

Answer 1

(b) Angle of deviation decreases but after certain value of incident angle deviation angle increases.

Answer 2

Hey dear,

● Answer -
(b) Angle of deviation decreases but after certain value of incident angle, deviation
angle increases.

● Explaination -
- Angle of deviation varies with angle of incidence.
- As incident angle increases, deviation angle first decreases reaches certain minimum value and again starts increasing.
- At this minimum angle of deviation, angle of incidence is same as angle of emergence.

Hope this helps...