The Photon

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The photon is a massless particle with proper momentum  P = E/+ p, where the energy is given by Planck’s Law: 

                    = ħω = hf .

Exercise: Show that  ħ(ω/k), where  ω2 c2k2  and  ħk.

Click here for solutions to this exercise.)

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Next section: Energy-Momentum Conservation.

© David Hestenes 2005, 2014