A formula for the expected value for the number of these at a given pressure and temperature invokes a factor of zeta of three. A Bose gas was first formulated to consist of these, which, when put in a box, would have energy 
A formula for the expected value for the number of these at a given pressure and temperature invokes a factor of zeta of three. A Bose gas was first formulated to consist of these, which, when put in a box, would have energy equal to h omega times the number of these. De Broglie extended a property commonly associated with them to any particle with momentum. For 10 points, gamma radiation consists of high energy ones of these massless particles, the bosons of the electromagnetic force and quantization of light.
A formula for the expected value for the number of these at a given pressure and temperature invokes a factor of zeta of three.
{photons}