Question

A ray of light is incident normally on a plane mirror. (i) what is its angle of incidence? (ii) what is the direction of reflected ray?

Answer 1

1)The angle of incidence is the angle between the incident ray and the normal, i.e, angle i.
2) the reflected ray is formed at 90° with the incident ray at the point of contact. That is, on the surface of the object.
*hope this helped. Make sure to use arrow heads to indicate the direction of light rays*

Answer 2

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i) When a ray of light is incident normally on on a plane mirror then i.e. ∠i = 0.

Reason -

→ We know that, the ray is incident normally on a plane mirror and angle of incidence is the angle between the normal and the incident ray. Thus, the ray incident normally is submerging the normal making an angle equal to zero.

ii) The direction of reflected ray will be on the same path retracing its incident ray.

Also, refer the picture given above.

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