What is meant by the equivalent mass of photon?
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What is meant by the equivalent mass of photon?
Photons have null rest mass and only their energy can be translated into the equivalent amount of mass according to the relation m = E/c^2 , but which is sometimes called the relativistic mass = h/cλ.
Does a photon have de Broglie wavelength?
Yes a photon has de Broglie wavelength.In 1924,Louis de Broglie proposed that a particle must also act like wave,in silmilar way,wave behave like particles.
Does a photon particle have mass?
Since photons (particles of light) have no mass, they must obey E = pc and therefore get all of their energy from their momentum.
Why is photon massless?
If there was a way (there isn’t; special relativity prohibits it) to observe a photon at rest, you would find it massless. All the relativistic mass of the photon comes from it’s energy. This is why we usually say that photons are massless.
Do all photons have same mass?
Although photons don’t have mass, they do have momentum because they are moving (fast!). The higher a light wave’s frequency is, the more momentum it has and the more energy it carries, just as larger masses equal higher energies. Gamma rays have higher frequencies than radio waves, so they have higher energies.
How do photons 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.
How do you find the de Broglie wavelength of a photon?
de Broglie derived the above relationship as follows: 1) E = hν for a photon and λν = c for an electromagnetic wave. 2) E = mc2, means λ = h/mc, which is equivalent to λ = h/p. Note: m is the relativistic mass, and not the rest mass; since the rest mass of a photon is zero.
Is de Broglie’s relation applicable to a photon?
As photon is a constituent of electromagnetic radiation (light) we can understand that it has both particle and wave like properties (wave-particle duality). So finally, the answer which is the sole objective of a question is: Yes. De brogile wave can be applied to a photon.
Is the photon massless?
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.