The intensity of direct sunlight on a surface normal to the rays is . What is the intensity of direct sunlight on a surface, whose normal makes an angle of with the rays of the sun |
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The intensity of direct sunlight on a surface normal to the rays is . What is the intensity of direct sunlight on a surface, whose normal makes an angle of with the rays of the sun |
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a) |
b) |
c) |
d) |