# How can photons have no mass and yet still have energy given that E=mc2?

What we are referring here is this most famous equation: When a particle has zero mass, its energy must be zero because E = 0 * c^2 = 0. So you are already concluding it right. A photon (light particle) that has its mass zero, could not have energy. As many has mentioned, E = mc^2 is […]

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