Sat September 17, 2011 By:

sir..urgent..plz answer..

Expert Reply
Sat September 17, 2011
The "rate of emission of quanta" means the number of quanta per second.
Energy of photon = h x c / lambda (wavelength)
Power = change in energy / change in time
Surface area of sphere = 4?r
Sat April 01, 2017


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