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Simple Answer:
Photons are never at rest. It is a fundamental property of the photon that it moves always at the speed of light.
Complex Answer:
Only in a vacuum can we say that light travels at the universal speed, c; the speed of light.
Of course, "the speed of light" is slower for a light moving inside of matter. Indeed, the simplest form of this is demonstrated with light passing through glass where refraction occurs and the speed drops to v=c/n, where v is the speed of light in matter, c is the speed of light in vacuum and n is the index of refraction of the material.
In recent years, it has been demonstrated that under versy special circumstances, light from a laser may be slowed to a few meters per second. That is extreme, but the circumstances constructed to achieve such a phenomena are also extreme.
Some people would say that when a photon passes through matter, it ceases to become one photon and is immersed in a sea of photons that constitute the electromagnetic interactions in that matter. Most people will not invoke this issues when discussing light in matter, but if one wants to stay entirely in the language of photons, the sea of photons has to be incorporated.
With all that said, the answer remains that there are no ways known to make a photon exist in a state of rest.
What else can I help you with?
What is the fastest thing that doesn' exist?
a photon when it is entangled
What is the plot mass of photon?
the photon has got 0 rest mass .and plot mass means? not knowing..
What subatomic particles have a mass of 0?
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.
What is the mass of moving photon?
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.
Why the rest mass of photon is zero?
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.
How many members are in the photon family?
The photon family consists of one member, which is the photon itself. Photons are elementary particles that carry the electromagnetic force and have zero rest mass.
Can you explain why an electron's energy increases when it absorbs a photon and also describe what happens to the photon in this process?
When an electron absorbs a photon, its energy increases because the photon transfers its energy to the electron. The photon ceases to exist as a discrete particle and its energy is absorbed by the electron, causing it to move to a higher energy level.
What is the mass of a photon in motion?
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).
What is the speed of photon at rest?
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."
What is the difference between a photon and an electron?
charge mass, Whether or not two can exist at the same place.
How can particles exist without mass?
People are sometimes confused by the assertion that photons, neutrinos, or other particles have a rest mass of zero. These particles are never at rest, so their rest mass is a purely theoretical concept. All particles have mass, there are no exceptions. It can be a very small amount of mass, as is the case for a photon, but there is some mass. A photon can also be described as being composed of energy, but remember that there is a mass-energy equivalence, as described by Einstein's famous equation, e=mc2. If a particle has energy, it therefore also has some amount of mass.
What is the mass of one photon?
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!
