1.

If I n denotes the normal intensity and I represents the intensity at angle , then

A. I <sub> </sub>= 2 I <sub>n</sub> cos
B. I <sub> </sub>= 3 I <sub>n</sub> cos
C. I <sub> </sub>= 4 I <sub>n</sub> cos
D. I <sub> </sub>= I <sub>n</sub> cos
Answer» E.


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