Question

A light ray is incident on a reflecting surface. If the light ray makes a 40° angle with respect to the normal to the surface, what is the exact angle (in degrees) made by the reflected ray relative to the normal? Do not include units with your answer.

Answer 1

Answer:

40°

Explanation:

when a ray light is incident on a surface it makes a 40° angle with the normal to the surface (reflecting surface ). this called angle of incidence.

And the angle made by reflected ray with the normal to the surface is called angle of reflection.

by the law of reflection angle of incidence is equal to the angle of reflection

hence the answer to the question is 40°        ( because ∠i =∠r )

Answer 2

The exact angle (in degrees) made by the reflected ray relative to the normal is; 40°

What is the angle of reflection?

Angle of incidence of a ray is the angle made by the ray with the surface it hits. Thus, this ray of light that is incident on the surface making an angle of 40° with the normal to the surface and so it is called angle of incidence.

Secondly, the angle made by the reflected ray with the normal to the surface is called angle of reflection.

Thus, by use of the law of reflection, we can say that;

Angle of incidence = The angle of reflection

Since the light ray makes a 40° angle with respect to the normal to the surface, then the reflected ray is also 40°

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