# Why do photons not have infinite mass?

## Why do photons not have infinite mass?

Photons have no such resistance and travel at the fastest speed possible through space – about 300,000 kilometers per second. So, do photons have infinite mass because they travel at the speed of light? Since they never come to rest, it makes sense that they couldn’t be considered to have rest mass.

### What would happen if photons have mass?

The speed of light is special: nothing with mass can move at that speed, or accelerate to it. If photons have mass, then obviously the “speed of light” becomes a misnomer. Massless particles would still travel at that speed — if any particles end up being massless after the carnage is done.

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#### How can photons have momentum if they don’t have mass?

In short, even though photons have no mass, they still have momentum proportional to their energy, given by the formula p=E/c. Because photons have no mass, all of the momentum of a photon actually comes from its energy and frequency as described by the Planck-Einstein relation E=hf.

Can a particle have no mass?

In particle physics, a massless particle is an elementary particle whose invariant mass is zero. The two known massless particles are both gauge bosons: the photon (carrier of electromagnetism) and the gluon (carrier of the strong force). Neutrinos were originally thought to be massless.

Can a photon ever have mass?

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.

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## Do photons have any mass?

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

### Is it possible that photons can have momentum?

Particles carry momentum as well as energy. Despite photons having no mass, there has long been evidence that EM radiation carries momentum. (Maxwell and others who studied EM waves predicted that they would carry momentum.) It is now a well-established fact that photons do have momentum.

#### Is it possible for a photon to have zero mass?

There is nothing special about the photon having zero mass. Although zero is the smallest mass any particle can have, it is as good as any other value. In this sense, there is no mathematical proof that the photon has to have zero mass, this is a purely experimental fact. And, to our best knowledge,…

What happens to a photon when it hits an object?

The photon has zero mass but has energy. So when the photon “hits” something it will be either reflected, absorbed, or absorbed and re-emitted. The latter two cases altering the (energy) state of the object that was “hit.” I am happy to have found this website for the first time this evening (10/21/2018).

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Does light have a mass?

It has NOTHING to do with light having a mass. Zz. Many people have been arguing for a long time that it doesn’t. The arguement is not about the physics of whether photons have mass. Its a debate about the definition of “mass” which will give either a yes or no according to the definition.

## What is the energy of a photon governed by?

The same year (the same freaking year) he figured out that light is both a particle and a wave and that the energy of a photon isn’t governed by it’s mass or it’s velocity (like matter), but instead is governed entirely by f, it’s frequency: E=hf, where h is Planck’s constant. For light m=0, so E=Pc (energy and momentum are proportional).