Question

A ray of light is incident at angle 30 degree on a plane mirror. The angle between the incident ray and the reflected ray is ?

Answer 1

Answer:

The angle between the mirror and the incident ray is 30 degrees. ... So, the angle of incidence is 90 - 30 = 60 degrees. As the angle of incidence and the angle of reflection are equal, both angles equal 60 degrees.

Answer 2

The ray of light is incident at an angle of 30° on a plane mirror. The angle between the incident ray and the reflected ray is discussed below -

• When the ray of light is incident at an angle of 30°, then the incident angle will be ( 90° - 30° ) which will be equal to 60°.
• According to the law of reflection, the angle of incidence will be equal to the angle of reflection. Therefore, the angle of reflection also will be 60°.
• So, the angle between the incident ray and the reflected ray is 120°.

The Angle of incidence -

• The angle which an incident line or ray makes a perpendicular to the surface at the point of incidence.

The angle of reflection -

• The angle made by a reflected ray a perpendicular to the reflecting surface.