|MadSci Network: Physics|
..or any other easily obtained material? Also, in the case of a digital camera with a flash and a surface: the magnitude of light is some constant/x^2 where x is the distance in meters from the source of light, right? if so, then how much light reaches the camera when the reflecting surface has a reflectivity of R... is it R*constant/(2x)^2 or R*constant/x^4 or in plain english, does the light reach the surface, and then reflect, getting absorbed some, and then move back toward the camera as if the surface was the emitter (in which case the amount of light = R(Constant/x^2)/x^2 = R*constant/x^4) or does the light reach the surface and reflect back as if it is going through the surface, in which case the amount of light would be Rconstant/(2x)^2. Or maybe I'm completely wrong :) -Roman R.
Re: What is the reflectivity of standard 8x11.5' printing paper
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