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29 September, 04:58

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.

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  1. 29 September, 04:59
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    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)
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