3 years ago

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Mathematics

1 answer:

Alenkinab [10]3 years ago

8 0

Answer:

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According to Lambert's law, the intensity of light from a single source on a flat surface at point P is given by Upper L equal

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Step-by-step explanation:

Lambert's Law is given by:

$L = k*cos^{2}(\theta)$ (1)

(a) We can rewrite the above equation in terms of sine function using the following trigonometric identity:

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By entering equation (2) into equation (1) we have the equation in terms of the sine function:

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(b) When θ = 0, we have:

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We know that cos(θ) is a trigonometric function, between 1 and -1 and reaches its maximun values at nπ, when n = 0,1,2,3...

Hence, L reaches its maximum value when θ = 0 because cos²(0) = 1.

I hope it helps you!

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