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fball558
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Homework Statement
A certain laser outputs pure blue light (photon energy 3.1 eV) with power 800 milliwatts (0.8 watts). How many photons per second does this laser emit?
Homework Equations
1 Ws = 6.24151e18
might need E = hv or E = (hc)/fequency where h is 6.6e-34
The Attempt at a Solution
not sure if i did it write but i took the .8 multiplied by the 6.24e18 (this is converting Ws to eV) then i x this number by the 3.1 eV to get 1.5479e19
this should be eV/s. then i am lost. not sure if that is even right so any help would be great!