Chapter 16, Problem 056 Suppose that is the intensity at a spot that is 82 m...

Question

Question

Answer 1

Answer #1

Since the source is same, power by both will be same,

i1*4pi*r1^2 = i2*4pi*r2^2

3e-4*25^2 = i2*82^2

i2 = 3e-4*25^2/82^2 = 0.0000279 W/m^2

Answer 2

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