Does a photon have relativistic mass?

Photons have no inertial mass and no relativistic mass. Experiments have demonstrated that photons do have momentum, though. Special relativity explains this effect theoretically. Gravity affects photons in a way similar to how it affects matter.

Does a photon have a mass?

Since photons (particles of light) have no mass, they must obey E = pc and therefore get all of their energy from their momentum.

How does a photon have no mass?

Why do photons have no mass? In short, the special theory of relativity predicts that photons do not have mass simply because they travel at the speed of light. This is also backed up by the theory of quantum electrodynamics, which predicts that photons cannot have mass as a result of U(1) -gauge symmetry.

Do photons have mass at rest?

According to electromagnetic theory, the rest mass of photon in free space is zero and also photon has non-zero rest mass, as well as wavelength-dependent. The very recent experiment revealed its non-zero value as 10 – 54 kg ( 5.610 × 10 – 25 MeV c – 2 ) .

What is the mass of a photon?

At the same time, a photon cannot have mass and, therefore, weighs nothing. The theory of relativity tells us that the mass of an object is proportional to the square of its velocity.

Do photons have mass or momentum?

Light is composed of photons, so we could ask if the photon has mass. The answer is then definitely “no”: the photon is a massless particle. According to theory it has energy and momentum but no mass, and this is confirmed by experiment to within strict limits.

What is the mass of photon in motion?

A photon has energy E = hf where h is Planck’s constant and f is the frequency of the photon. ⇒ m = hx/c2 is the mass of a photon in motion.

Do all the photons have same mass if not why?

Since frequency (v) of different colours is different, hence their equivalent masses are different.