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प्रश्न
State the direction of incident ray which after reflection from a spherical mirror retraces its path. Give reason for your answer.
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उत्तर
When incident ray is directed towards the centre of curvature, at all the points of spherical mirror, the ray is always normal. Therefore, angle of incidence i = Angle of reflection r = 0°.
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संबंधित प्रश्न
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