The intensity I of light from an isotropic point source is determined as a function of distance
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The intensity I of light from an isotropic point source is determined as a function of distance r from the source. Figure gives intensity I versus the inverse square r-2 of that distance. The vertical axis scale is set by I s = 200 W/m2, and the horizontal axis scale is set by rs-2 = 8.0 m-2. What is the power of thesource?
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I(W/m)
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Related Book For
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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