Question

2. A ray of light is incident on a plane mirror at an angle of 40°. Find the angle of incidence and the angle of
reflection?
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Answer 1

Answer: 80 degrees

Explanation:

Angle between incident & respected rays is 80 degree.

Incident angle = angle of incident ray to the normal.

Reflections angle=Angle of reflected ray to normal.

For any mirror, incident angle= reflections angle.

Angle between incident & reflections rays = incident angle + reflections = 40 + 40 = 80 degree.

Answer 2

Answer:

angle of incidence = angle of reflection = 40°

Explanation:

from the laws of reflection.we know that angle of incidence is always equal to the angle of reflection.

we are given that an incident ray incidents the plane mirror at an angle of 40° which is the angle of incidence.

if the angle of incidence is 40° then the angle of reflection is also 40°.

theferore, angle of incidence=angle of reflection=40°