Equation which is related with the Lorentz invariant quantities • Physics Forums

Dhmht_Kr · 2023-01-12T14:25:21+00:00

Hi every one.How can i prove the below equation? And then that it's Lorentz invariant quantitude ? Thanks for your help

Thread 'How Can Photons Be Massless Yet Have Energy According to Einstein's Equations?'

Since E = mc^2, how can photons be massless? If a photon has no mass, then, according to Einstein's formula, its energy is given by E = 0 x c^2, which is 0. Yet, photons do have energy. This seems to be a complete contradiction. Please explain! Thank you.

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I Equation which is related with the Lorentz invariant quantities

Thread 'How Can Photons Be Massless Yet Have Energy According to Einstein's Equations?'

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