The intensity I of light from an isotropic point source is determined as a function of
Chapter 33, Problem 18(choose chapter or problem)
The intensity I of light from an isotropic point source is determined as a function of distance r from the source. Figure 33-37 gives intensity I versus the inverse square r2 of that distance. The vertical axis scale is set by Is 200 W/m2, and the horizontal axis scale is set by What is the power of the source? )Is0 r s2r 2 (m2)
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