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Q.

The normal at the point of incidence is 

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a

Parallel to the surface

b

Perpendicular to the surface

c

At a 45° angle to the surface

d

At a 30° angle to the surface 

answer is B.

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Detailed Solution

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The normal is an imaginary line perpendicular to the surface at the point where the incident ray strikes. According to the law of reflection, the incident ray, the reflected ray and the normal at the point of incidence lie in the same plane.

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