It's (double the photon's energy) divided by (the speed of light squared).
The photon's energy depends on its frequency, and is (frequency) times (Planck's konstant).
A photon is a massless particle, so it does not have a rest mass. It only possesses energy and momentum, but in the context of special relativity, mass is not a property of a moving photon.
the photon has got 0 rest mass .and plot mass means? not knowing..
Photons have no mass.
mass of the proton is 0. Answer 2 But the question asked about photons, not protons. The mass of a photon is also 0, though the mass of a proton is not!
A photon.
The photon. This refers to the "rest mass"; since the photon has energy, it also has an associated mass. But the "rest mass" or "invariant mass" is zero.
A photon is a massless elementary particle that does not have rest mass, while an inertial particle typically refers to a particle with mass that obeys Newton's laws of motion. Photons always travel at the speed of light in a vacuum, whereas inertial particles can have a range of velocities depending on their energy.
A photon has zero electrical charge.
Yes, a Photon's mass is theorized to be zero.
If you mean a gamma photon, it is mass-less.
I call it a 'photon'.By the way, the photon has zero rest mass, but when it travels at the speed of light ...which it always does ... it has some mass.
Light is a beam that is shot out of a light source or explosion of gas and photon particles give of that beam which does have a mass but todays technology is unable to measure it.