If I n denotes the normal intensity and I α represents the intensity – McqOptions

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1.	If I n denotes the normal intensity and I α represents the intensity at angle α, then
A.	I α = 2 I n cos α
B.	I α = 3 I n cos α
C.	I α = 4 I n cos α
D.	I α = I n cos α
Answer» E.

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