Question

if the angle between the plane mirror and incident ray is 60 degree what are the angle of incidence and reflection​

Answer 1

Answer:

Since, angle of incidence = angle of reflection = 30 degrees. ... The reflected ray will make an angle of 60 degrees (90 - 30 degrees) with the mirror surface.

Answer 2

Concept

Reflection of light refers to the act of light rays hitting a surface and reflecting back.

The angle between the incident ray and the normal formed at the site of incidence is known as the angle of incidence.

The angle of reflection is the angular relationship between the normal and reflected beams at the point of incidence.

At the point of contact, the normal is a line perpendicular to the surface.

According to the laws of reflection,

• The angle of the reflected ray, when reflecting from a smooth surface, is equal to the angle of the incident ray, with regard to the surface's normal.

• The reflected ray is always in the plane defined by the incident ray and the surface normal at the point of contact of the incident ray.

Given

The plane mirror and incident ray form a 60 degree angle.

Find

We have to find the angle of incidence and the angle of reflection.

Solution

The incident ray and the plane mirror are at an angle of $60^{0}$.

Since, the normal is a line perpendicular to the surface at the point of contact, therefore,

Angle of incidence$=90^{0} - 60^{0} =30^{0}$

Now, according to laws of reflection, we have

The angle of the reflected ray, when reflecting from a smooth surface, is equal to the angle of the incident ray, with regard to the surface's normal.

Therefore, angle of reflection$=30^{0}$

Hence, both the angle of incidence and the angle of reflection are $30^{0}$.

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