Do photons have momentum?

"momentum is the product of mass and velocity, so, by this definition, massless photons cannot have momentum". This reasoning does not hold. Momentum is the product of energy and velocity. "How is this momentum defined (equations)?". read more

"momentum is the product of mass and velocity, so, by this definition, massless photons cannot have momentum" This reasoning does not hold. Momentum is the product of energy and velocity. read more

The answer to this question is yes photons have momentum. Einstein’s formula for it is a clear error. Energy and momentum are always calculations of the very same event. read more

Posted on September 8, 2010 by The Physicist Physicist: Classically (according to Newton) kinetic energy is given by and momentum is given by , where m is mass and v is velocity. read more