how can we sad that photon does not have a mass? in my book they are a piece that there write at the photon influence of gravitation?
aloshi said:how can we sad that photon does not have a mass? in my book they are a piece that there write at the photon influence of gravitation?
One of the main pieces of evidence is the fact that photons travel at the speed of light, which is a fundamental constant in the universe. According to Einstein's theory of relativity, objects with mass cannot reach the speed of light. Therefore, the fact that photons travel at this speed suggests that they do not have mass.
While photons do have energy, this energy is not equivalent to mass. Photons are considered to be massless because they do not have a rest mass, which is the mass an object has when it is not moving. The energy of a photon comes from its momentum and frequency, not from its mass.
The Higgs field is responsible for giving particles their mass through a process known as the Higgs mechanism. However, this only applies to particles that interact with the Higgs field, such as the W and Z bosons. Photons do not interact with the Higgs field, which is why they do not acquire mass from it.
Yes, there have been numerous experiments that have directly measured the mass of photons and have found it to be zero. One of the most famous examples is the Michelson-Morley experiment, which showed that the speed of light is the same in all directions, regardless of the direction of the Earth's motion. This would not be possible if photons had mass.
According to current scientific understanding, photons cannot gain mass under any circumstances. However, there are some theories that suggest that in certain extreme conditions, such as in the early universe, photons may have had a small amount of mass. However, this is still a topic of debate and has not been confirmed by any experimental evidence.