Question

The angle between an incident ray and the plane mirror is 35°. The total angle between the incident ray and reflected ray will be:
(a) 35^ (b)70^ (c)105^ (d)110^
class 10 science chapter 10​

Answer 1

Answer:

d) 110°

Explanation:

The normal makes 90° in the plane mirror.

Thus the angle of the incident ray is 90°-35°=55°

The angle of incidence = Angle of reflection.

Implies total angle = 55°+55° = 110°

Hence the total angle between the incident and reflected ray = 110°

Answer 2

We know that, Normal makes 90° in a plane mirror.

So, Angle of Incidence = 90 - 35 = 55°

and, we know that, ∠i = ∠r

so, Total angle is calculated by

= 55° + 55°

= 110°