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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. | |