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Q.

Is it true that a ray of light passing through the centre of curvature of a concave mirror gets reflected back along the same path?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
As the angle of incidence is 00, so the ray passing through the centre of curvature is incident normally to the mirror. And also, the angle of reflection is zero. This point of contact would meet at 900, where the radius of curvature is perpendicular to the tangent making the incident ray and the reflected ray coincide with each other.
The ray of light passes through the centre of curvature of a concave mirror, strikes the mirror along the normal ray, it incident upon the mirror at an angle of 900. Hence, the incident ray coincides with the normal.
      
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