May 26, 2016

Homework Help: PHYSICS

Posted by please help on Thursday, April 4, 2013 at 10:05pm.

Light is shining perpendicularly on the surface of the earth with an intensity of 680 W/m2. Assuming that all the photons in the light have the same wavelength (in vacuum) of 478 nm, determine the number of photons per second per square meter that reach the earth.

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