Question

A plane mirror is placed on an incline of inclination 'b'. An incident ray gets reflected as shown. What is the value of 'x' ?

• A. a
• B. b
• C. a+b
• D. a-b

Answer 1

The correct option is A a

According to the laws of reflection, angle of incidence is equal to angle of reflection. This law is valid irrespective of the orientation of the reflecting surface.
Angle of incidence = a
Angle of reflection = x

Using the law, x = a