Question

A plane mirror is inclined at 25º to the floor. An incident ray parallel to the floor strikes the mirror and a reflected ray is formed. What is the angle of reflection ?

Answer 1

Answer:

The angle of reflection is 65 degree.

Explanation:

Given,

We have a plane mirror inclined at an angle of 25 degree. We need to find the angle of reflection when an incident ray strikes the mirror.

So according to the laws of reflections,

1) The incident ray, the reflected ray and the normal all lie in the same plane.

2) The angle of reflection = the angle of incidence.

So since the incident ray is incident on the mirror and the mirror is inclined at an angle of 25 degree.

The angle of incidence will be equal to the normal - angle of reflection.

i = 90 - r

i = 90 - 25

i = 65

Hence the angle of reflection is 65.

Laws of reflection

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