You are standing 10 meters from a light source. then, you back away from the light source until you are 20 meters away from it. from your perspective, what has happened to the intensity of the wave? a) it has decreased by a factor of two. b) it has increased by a factor of two. c) it has decreased by a factor of four. d) it has increased by a factor of four.
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You are standing 10 meters from a light source. then, you back away from the light source until you...
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