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OpenStudy (anonymous):
Light with a wavelength of 5.0 · 10-7 m strikes a surface that requires 2.0 ev to eject an electron. Calculate the energy, in electron volts, of one incident photon
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OpenStudy (sidsiddhartha):
energy=hc/lamda=(6.625*10^-34*3.8*10^8)/(5*10^-7)=3.97*10^-19j=2.484 ev
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