Question

the angle between the mirror and the incident ray is 30 degree the angle of reflection is what​

Answer 1

Answer:

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

Answer 2

Given:

The angle between a plane mirror and a ray of incidence = 30°

To find:

The angle of reflection =?

Solution:

The angle formed by a ray of incidence striking the mirror as well as a ray of reflection coming out of the mirror is always measured from the normal.

Therefore let us first calculate the angle of incidence.

=> angle of incidence (i) = angle of mirror from normal -  angle between the mirror and incident ray

∠i = 90° - 30°

∠i = 60°

The angle of incidence is equal to 60°.

Now, we know that angle of incidence and angle of reflection are always the same as normal.

∴ angle of incidence from normal = angle of reflection from normal

=> ∠i =∠r

=> ∠i =∠r = 60°

=> ∠r = 60°

Hence, the angle of reflection is found to be 60°.