Speed = 0 The definition of "rest" is zero velocity in the observer's frame of reference. However, it's important to point out that photons don't do "at rest."
The rest mass of a photon is considered to be zero because photons are massless particles. They travel at the speed of light in a vacuum and do not possess rest mass. This is a fundamental property of photons in the Standard Model of particle physics.
The speed of a photon in a vacuum is approximately 299,792 kilometers per second, which is the fastest speed possible in the universe.
That's related to the fact that it moves at the speed of light. If you look at the formula for mass increase as a function of speed, it should be obvious that the mass of anything that has a non-zero (i.e., positive) rest mass would approach infinity as the object approaches the speed of light - meaning that the speed of light itself can never be reached, since that would give the object an infinite mass (and require an infinite energy). The only way an object can move at the speed of light is for it to have a rest mass zero. In a way, this is hypothetical, since particles such as the photon or graviton, that move at the speed of light, can only move at the speed of light.
The rest mass of a photon is significant in particle physics because it is zero. This property distinguishes photons from other particles, such as electrons and protons, which have non-zero rest masses. The masslessness of photons is a key factor in their behavior and interactions, including their ability to travel at the speed of light and their role in electromagnetic interactions.
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 rest mass of a photon is considered to be zero because photons are massless particles. They travel at the speed of light in a vacuum and do not possess rest mass. This is a fundamental property of photons in the Standard Model of particle physics.
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).
Yes, a photon moves at the speed of light, because photons have no mass.
The speed of a photon in a vacuum is approximately 299,792 kilometers per second, which is the fastest speed possible in the universe.
Nowhere. A photon must travel at the speed of light so it starts with that speed when it is created. This is the origin of the theory of special relativity.
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.
That's related to the fact that it moves at the speed of light. If you look at the formula for mass increase as a function of speed, it should be obvious that the mass of anything that has a non-zero (i.e., positive) rest mass would approach infinity as the object approaches the speed of light - meaning that the speed of light itself can never be reached, since that would give the object an infinite mass (and require an infinite energy). The only way an object can move at the speed of light is for it to have a rest mass zero. In a way, this is hypothetical, since particles such as the photon or graviton, that move at the speed of light, can only move at the speed of light.
the photon has got 0 rest mass .and plot mass means? not knowing..
The rest mass of a photon is significant in particle physics because it is zero. This property distinguishes photons from other particles, such as electrons and protons, which have non-zero rest masses. The masslessness of photons is a key factor in their behavior and interactions, including their ability to travel at the speed of light and their role in electromagnetic interactions.
I have a theory gw+l=gw l=m. If a gravitational warp traps photon then photon have mass. A small amount 0.000000000000000000000000001 mg. That is what i think. ============================================= Until such time as the previous contributor's hunch can be tested in the laboratory, all theory and experiment so far has shown the rest mass of the photon to be zero.
When describing photons specifically rest mass is zero. The "rest mass" is the hypothetical mass a photon would have if it weren't moving at the speed of light, which as just stated, is zero. Nothing with a non-zero rest mass can travel at the speed of light in a vacuum, because it would require a literally infinite amount of energy to accelerate to that speed. (Neutrinos have a very small, but non-zero, rest mass, and therefore travel at most at slightly under the speed of light.)
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.