If light does not have mass, then how can it bend due to gravity? How can light have momentum if mass is 0?
If light does not have mass, then how does it have momentum?
Physics: Why don’t photons have mass? Does energy have mass or light (as in light beam) have mass? Do photons, the particles of light, have mass? Why don't photons have mass? Does a moving photon have mass? What is the mass of photon? Is light really a type of energy? Does energy have mass? What happens to the mass of an object if it travels with the speed of light? Can a massless particle have no momentum? Does light have kinetic energy? How can a photon have no mass when E=mc^2? Does laser light have mass? Is energy a form of mass? What happens to a mass of an object when it moves with the speed of light? How can photons have no mass and yet still have energy given that [math]E=mc^2[/math]? How is mass related to velocity? Where do photons appear from when mass and energy are combined? How can we say that energy is mass? If photons have no mass, how are solar sails pushed? Does potential energy have mass? Given that photons have no mass and the speed of light cannot be exceeded, could there be a negative mass that exceeds the speed of light? Why does light have energy? Why does mass become infinite at the speed of light? Why does an object with a large mass have more potential energy than a smaller mass object? What happens to the mass of an object when an object is about to reach the speed of light? Do massless particles have to travel at the speed of light? What does it mean for a particle like a photon to have a rest-mass of zero? How can a photon exist if it is massless? How is light a form of energy? Can we turn mass to energy and vice versa or is it theoretical only?