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Question:: Mechanics

October 19, 2009
Asked by: Ram
Title: Mechanics
Question: Light Energy falling per Unit area and and Unit time is given..That is in W/metre square..How we will find force experienced By the surface if time and area given...
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posted by S @ 6:05 PM  
1 Comments :
  • At October 23, 2009 at 4:43 PM, Anonymous Anonymous said…

    Radiation pressure is the pressure exerted upon any surface exposed to electromagnetic radiation. If absorbed, the pressure is the power flux density divided by the speed of light. If the radiation is totally reflected, the radiation pressure is doubled. For example, the radiation of the Sun at the Earth has a power flux density of 1,370 W/m2, so the radiation pressure is 4.6 ┬ÁPa (absorbed)

     

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