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OpenStudy (anonymous):
How many photons are in a laser pulse of 0.363J at 657 nm?
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OpenStudy (anonymous):
E=h*v \[E=(h*c)/\] E=((6.62*10^-34)*(3*10^8))/(657*10^-9) E=3.025*10^-19 J, this is the energy of one photon N=Np/Nph N=(.363)/(3.025*10^-19) N=119.9*10^16 photons
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