De Broglie developed Equation 5 2 initially for photons, assuming that they had a small but finite mass His assumption was that RF waves with 30 m traveled at a speed of at least 99 percent of that of visible light with 500 nm Beginning with the relativistic expression hf mc 2 , verify de Broglies ...

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De Broglie developed Equation 5-2 initially for photons, assuming that they had a small but finite mass.

Question:

De Broglie developed Equation 5-2 initially for photons, assuming that they had a small but finite mass. His assumption was that RF waves with λ = 30 m traveled at a speed of at least 99 percent of that of visible light with λ = 500 nm. Beginning with the relativistic expression hf = ϒmc², verify de Broglie’s calculation that the upper limit of the rest mass of a photon is 10^-44 g.