The brightness b of the sun (in watts per square meter) at a distance of d meters

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The brightness b of the sun (in watts per square meter) at a distance of d meters from the sun is expressed as an inverse-square law in the form b = L/4πd2, where L is the luminosity of the sun and equals 3.9 × 1026 watts. What is the derivative of b with respect to d at the earth's distance from the sun (1.5 × 1011m)?

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Calculus

ISBN: 9781319055844

4th Edition

Authors: Jon Rogawski, Colin Adams, Robert Franzosa

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