Does light have a mass weight ?

Light is a phenomenon produced by the magnetic field with the change of the parameters of the light source, so whether there is mass in light is actually whether the magnetic field has mass or not. The magnetic field certainly has mass, that is to say light has mass. Because without mass there is no energy, and without energy there can be no propagation.

In addition, the magnetic field has no mass, and the magnetic field of millions of kilometers cannot exert pressure on the earth, so it cannot form a gravitational phenomenon. So the magnetic field has mass, i.e., light has mass. Only when light has mass, light can have energy, and energy can make the earth warm, produce photosynthesis, and enable plants to absorb energy is an inexhaustible source of use.

Photons are extremely relativistic particles. Light does not have a mass at rest, that is, light has mass only in the context of relativity.

E = M(C2) = HV can give the mass of a single photon. where "2" is squared, h is Planck's constant, v is the frequency of the photon, c is the speed of light in a vacuum, and m is the "mass" of the photon

Why is it said that the sun has shone on the earth for so long, but there is no "light" on the earth? ”

In fact, this problem has nothing to do with whether the light has quality or not. Photons are absorbed by the atoms of ground objects and "annihilated" when they reach the earth, and "annihilation" is the process by which photons disappear and the energy of photons is transferred to atoms, satisfying the law of conservation of energy in the process. To put it simply, the light disappears as soon as it reaches the ground.

Light should have weight, and when the light is shining directly, the length of the light will become an arc, because with weight, there can be an arc formation.

Light, like the real thing, has quality. Light presents itself as an internally contradictory phenomenon: light travels like a wave, and at this time it exhibits its own volatility, resulting in the interference of light.

and diffraction phenomena; When light is emitted and absorbed, these processes are not continuous"Streams'but in discontinuous shares, in quanta. It should be noted here that the mass possessed by light has no mechanical properties. According to modern physics, light is characterized by the absence of"Static mass", that is, the rest mass of light is equal to zero.

By its very nature, the mass of light has electromagnetic properties, and it can be called the same as the mass of moving electrons"Movement quality"(to distinguish from.)"Static mass"The whole quality inherent in light is"Movement quality"。This means that light cannot exist in a static state, and light cannot be imagined as relatively still.

According to the theory of relativity and quantum mechanics.

The explanation is that photons have no rest mass, so sunlight.

There is also no resting mass. But according to e=mc 2, if mass and energy are unified, then it can also be considered to have mass, but it is not the mass we usually call the mass at rest.

Light is an electromagnetic wave (visible spectrum) that can be seen (received) by the naked eye. In the scientific definition, light sometimes refers to all electromagnetic waves. Light is made up of a type of elementary particle called a photon. It has particle and wave properties, or wave-particle duality.

Light should have mass because it is a substance. But.

In the real sense, the speed of motion of an object does not exceed the speed of light, and photons have no rest mass, so light has no rest mass.