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Luenkel t1_jamnltq wrote on March 2, 2023 at 3:03 PM

Reply to comment by Emperor_Kael in Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science by AutoModerator

E=mc² is the formula for the specific case of a stationary, massive object. That clearly does not apply to a photon. The full equation is E²=m²c⁴+p²c², which simplifies to E=pc for a massless particle like the photon.