Astronomy
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General and Special Relativity

# Can photons travel faster than the speed of light?

001

No.

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###### 2017-02-13 23:25:50

In a vacuum, photons will only ever travel exactly at the speed of light. They can't go slower, and they can't go faster. Note that going faster than the speed of light would violate causality, so this is usually deemed impossible.

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###### 2017-02-13 17:53:06

No photons are massless particles of light and travel at the speed of light

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## Related Questions

There is nothing, including photons, that we know of that can travel faster then the speed of light. It is the single fastest known thing in our universe.

A photon. Neutrinos have mass and therefore must travel at less than the speed of light. Photons of light travel at the speed of light.

It seems to be impossible to travel faster than the speed of light (in a vacuum).It seems to be impossible to travel faster than the speed of light (in a vacuum).It seems to be impossible to travel faster than the speed of light (in a vacuum).It seems to be impossible to travel faster than the speed of light (in a vacuum).

Gamma particles are photons - or electromagnetic waves. They travel at the speed of light; nothing can go faster than that.

You don't. The only objects that can travel at the speed of light are those that ONLY travel at that speed, like photons or gravitons.

No. By travelling FASTER than the speed of light, this might in theory let you travel back in time. However, it seems likely that neither travelling faster than the speed of light nor time travel is possible. Also note that a human being cannot travel at the speed of light; with a super-spaceship, we might in theory approach this speed, but not quite reach it. Only particles with "zero rest mass" (such as photons or gravitons) can travel at the speed of light (and, in a vacuum, they can ONLY travel at the speed of light).

No. Nothing can travel faster than the speed of light.

Speed is how fast something moves. Light is a form of energy carried by massless photons, these photons move at the speed of light, which is the fastest speed that anything in the universe can travel.

Yes, a photon may travel at the speed of light. If it had mass, at the speed of light, its mass would be infinite. This is impossible, so photons travel at the speed of light and have no mass.

Any massless "thing" like a photon and MAYBE a neutrino. NOTHING with mass can travel at the speed of light. Photons travel at the speed of light. The entire electromagnetic spectrum travels at the speed of light.

Travel faster than the speed of light. By definition, Superluminal is "Faster-than-light (FTL)"

No. All colors travel at the same speed. It is called "the speed of light".

Light. No ordinary matter can travel at or faster than the speed of light.

An object (like us) whose common situation is to be below the speed of light, can never quite reach the speed of light. In theory, such an object can get quite close to the speed of light, though. There are particles - such as photons - that can only travel at the speed of light.

No. Speed of light is constant in all frames of reference, even if you are also traveling at the speed of light, the photon will speed away from you at the speed of light. When you see an object, what is happening is that photons are reflected off the object you are looking at and bounce back into your eye. However, if you are traveling faster than the speed of light, the photons can never reach you to start with, hence, you are invisible until your speed decreases to something below the speed of light. It is possible to travel faster than light in many ways. First, if you have a negative amount of energy, you will always travel faster than a speed of light. Another possible way is to compress the space in front of you, then move to your destination before re-expanding the space you have just past.

It isn't clear at all what you mean. In any case, it isn't possible to travel at the speed of light - except for specific particles, such as photons (pieces of light), which can ONLY travel at the speed of light.

Actually you can not travel faster than light speed.

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Some recent experiments (2010 and 2011) suggested that neutrinos might be massless and travel very slightly faster than the speed of light (0.003 %). However, these are at odds with measurements that show neutrinos and light photons travelling at roughly the same speed. Further experiments are planned to test how photons and neutrinos are affected by the medium they traverse. If neutrinos do have mass, by the theory of relativity they cannot reach or exceed light speed.

According to the Theory of Relativity, nothing can go faster than the speed of light. And since light is information, it cannot go faster than the speed of light.

Tachyons are hypothetical sub atomic particles that can travel faster than the speed of light.

The speed of light is almost a million times faster than the speed of sound. Lots of things are faster than the speed of sound. It is considered basically impossible for anything to travel faster than the speed of light.

I am not sure what you mean with "hyper velocity". In a vacuum, photons basically travel at a single speed, known as the "speed of light".

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