Technically everything we see and hear is massless, since photons and sound waves don't have any mass. Submitted by OwenIsSecretlyJesus t3_127n2nf on March 31, 2023 at 2:23 PM in Showerthoughts 8 comments 6
[deleted] t1_jeetkn4 wrote on March 31, 2023 at 2:27 PM [deleted] Permalink 1 iamnogoodatthis t1_jef0egm wrote on March 31, 2023 at 3:13 PM No you cannot. That tells you the energy content of a massive object, not that a photon has some mass thanks to its energy. The full relation is E^2 = p^2 c^2 + m^2 c^4. Permalink Parent 1
iamnogoodatthis t1_jef0egm wrote on March 31, 2023 at 3:13 PM No you cannot. That tells you the energy content of a massive object, not that a photon has some mass thanks to its energy. The full relation is E^2 = p^2 c^2 + m^2 c^4. Permalink Parent 1
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