main

prev        

Statement of a problem № 11324

        next    

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 730 nm, determine the number of photons per second per square meter that reach the earth.




New search. (Also 5349 free access solutions)


To the list of lectures