The angle of incidence for a ray of light passing through the centre of curvature of a concave mirror will be?

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45 degrees

90 degrees

0 degree

180 degrees

answer is C.

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Detailed Solution

The angle of incidence for a ray of light passing through the centre of curvature of a concave mirror will be

0^{0}

.
As the ray of light passes through the centre of curvature of a concave mirror, it incidents on the mirror along the normal, i.e. it incidences on to the mirror at

90 degrees

and

0 degrees

with normal. Hence the incident ray coincides with the normal. Therefore angle of incidence is

0 degrees

When a ray of light incidents upon a plane mirror, the light ray gets reflected off the mirror. After reflection, there is a change in the direction of the light rays. The convention used to express the direction of a light ray is to indicate the angle that the light ray makes with a normal line drawn to the surface of the mirror.

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