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I was doing a problem in the 6th edition textbook (Chapter 1, 59), and I was confused on how to get energy per photon. It involved using the De Broglie equation, but I don't know how to obtain the correct units because they do not cancel at the end.
Also, once you apply the equation E=hc/λ to find how much energy is produced by each individual photon, multiply the energy found from this equation with the total number of photons. This will cancel photons so your final answer will just be in just joules instead of joules/photon.
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