A parallel beam of light is incident normally on a plane surface absorbing 40% of the light and reflecting the rest . If the incident beam carries 10W of power , find the force exerted by it on the surface .
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Expert's answer
2017-11-24T14:42:07-0500
Solution. We have the following formula: F=P/c (1+ρ), where c – speed of light, ρ – coefficient of reflection, so F=10W/(3∙〖10〗^8 m/s) (1+0.6)=5,3∙〖10〗^(-8) N. Answer: 5,3∙〖10〗^(-8) N.
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