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OpenStudy (elianymendoza):
How many photons are produced in a laser pulse of 0.820 J at 681 nm?
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OpenStudy (anonymous):
The equation to find the number of photons is E=nhf n= number of photons h=planks constant f= frequency E=energy in joules you could find frequency by using the universal wave equation v(speed of light) =wavelength x freqeuncy butremeber that wavelength is inmeters not nanometers so you have to convert
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