Question
In the 25 ft Space Simulator facility at NASA’s Jet Propulsion
Laboratory, a bank of overhead arc lamps can produce light of intensity
2500 W/m2 at the floor of the facility. (This simulates the intensity of
sunlight near the planet Venus.) Find the average radiation pressure (in
pascals and in atmospheres) on (a) a totally absorbing section of the
floor and (b) a totally reflecting section of the floor. (c) Find the average
momentum density (momentum per unit volume) in the light at the
floor.
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