Question

020. Illumination at any point on a surface is
proportional to the
of the angle
between the normal at that point and the
direction of luminous flux.
(A) Sine
(B) Cosine
(C) Tangent
(D) Cose​

Answer 1

Answer:

Illumination at any point on a surface is

proportional to the

of the angle

between the normal at that point and the

direction of luminous flux

answer :- (B) Cosine

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