E=mc^2 doesn't mean that a photon has mass. Photons do produce gravitational eff...

		red75prime on June 27, 2024 \| parent \| context \| favorite \| on: A common misunderstanding about wave-particle dual... E=mc^2 doesn't mean that a photon has mass. Photons do produce gravitational effects due to their energy, but not in the same way as a particle with mass m. See, for example, https://physics.stackexchange.com/a/6222

A photon has no rest mass but it most certainly has mass-energy equivalence.