Question

a plane mirror makes an angle 30° with the horizontal if a vertical ray strikes the mirror find the angle between the mirror and the reflected ray

Answer 1

Hey there!

First refer to the attachment for the figure.


Since Normal is perpendicular to the mirror.

Therefore , Angle of incidence = 90° - 30°
i.e. 60°

Also, Angle of incidence = Angle of reflection
i.e. angle of reflection = 60°

Therefore , the angle between the mirror and reflected ray is 90° - 60° = 30°

Hope it helps!

Answer 2

Answer:

Angle of Incidence= 30°

As we know:

Angle of Incidence=Angle of Reflection

Therefore, 30°=30°

Angle between Mirror and Reflected Ray:

$\alpha = 90 - 30$

$\alpha = 60$