Albert Einstein s photon theory says that light is made up of photons, and where do the photons go

Hello, Einstein's "photon theory" actually refers to the "light quantum theory", that is, light is composed of light quanta one by one. The light quanta on our planet come from: the sun (most), artificial light sources (street lamps, fluorescent lamps, etc.).

The two outer earths and the sun are round, so daytime means that part of the surface of the earth is irradiated by the sun, and the other side is not irradiated by the sun, that is, night (day is dark), so the sunlight cannot reach the back of the earth at night, that is, the light quantum cannot reach the back side of the earth. Hehe, photons still exist, but on the other side of the planet. For example, it is dark on China's side, and the United States on the other side of the world is daytime, and the photons reach them, but our side does not.

Well, I think at night, maybe it's tired, or it goes somewhere else, or there's something more powerful to possess it, in fact, maybe it's okay, hehe, isn't it...

Albert Einstein proposed the photon theory to explain the photoelectric effect (a).

a.Correct

b.Mistake. The photon theory was proposed by Albert Einstein. A photon (also known as a quantum of light) is a particle with zero mass at rest and has energy and momentum.

The light propagating in space is discontinuous, but one by one, each of which is called a photon, and the energy of the photon is proportional to the frequency, i.e., e=h (h= . The energy of the photon is calculated in the following table: p = h = h c ( is the frequency, c is the speed of light, h is the Planck constant).

The photon theory holds that light is composed of a photon, and the propagation of light is the propagation of a photon, and the energy of a photon is Zheng Liangyi e=hr (h is Planck's constant, and r is the frequency of light).

Therefore, as long as the energy of a photon is greater than the work of the metal (the work of the electron detached from the metal atom to make the slag), the electron will be detached from the metal surface; As a result, a photocurrent is generated simply by light hitting the metal surface, and there is no need for time to accumulate, so the process is instantaneous.

The experimental rules of the photoelectric effect are as follows:

1. Only when the light frequency of the irradiated object is not less than a certain value, the object can emit photoelectrons, this frequency is called the limit frequency (or cut-off frequency), and the corresponding wavelength is called the limit wavelength. The limiting frequencies are different for different substances.

2. The initial velocity of photoelectrons when they leave the object is related to the frequency of irradiated light and has nothing to do with luminous intensity. That is to say, the initial kinetic energy of the photoelectron is only related to the frequency of the irradiated light and not to the luminous intensity.

3. The process of generating photocurrent is very fast, generally no more than l0 -9 seconds; When the light is stopped, the photocurrent stops immediately. This shows that the photoelectric effect is instantaneous. The intensity of the generated photocurrent is proportional to the intensity of the irradiated luminescence, and there is a saturation current.

Albert Einstein proposed the photon theory, and the pure matter which successfully explained the phenomenon of photoelectric coding and searching effect.

a.Correctb.Mistake.

Correct Answer: True.

Einstein's photon said:

The propagation of light is not continuous, it is one by one, each part is a photon, and the energy e=h

Explain the photoelectric effect in terms of photon theory:

When a photon hits a metal, its energy is all absorbed by an electron in the metal, and after the electron absorbs the energy, the kinetic energy increases. When its kinetic energy is large enough, it can overcome the attraction of the nucleus inside the metal and escape from the surface of the metal to become a photoelectron, which has a short emission time and does not require the accumulation process of energy.

2 Any ray of light moves at a definite velocity c in a "stationary" coordinate system, regardless of whether the ray is emitted by a stationary or moving object. ”

Summary. Photoelectric effect equation.

Einstein's equation popularized in 1905.

In the photoelectric effect, electrons in a metal have to overcome the attraction of atomic nuclei to work on it when they fly off the surface of the metal. Different electrons in a certain metal need different work to get out of this metal, and the minimum value of the work done to separate the electrons from a certain metal is called the work of escape from this metal.

Directory. 1 Overview.

2 formulas. 3 main content.

Maximum initial kinetic energy.

Escape work. Overview.

How is the energy produced by a photon in relation to Einstein's equation of the photoelectric effect.

In the equation of the photoelectric effect, which was popularized by Albert Einstein in 1905, the electrons in a metal must overcome the attraction of atomic nuclei to it when they fly off the surface of the metal. Different electrons in a certain metal need different work to get out of this metal, and the minimum value of the work done to separate the electrons from a certain metal is called the work of escape from this metal. Table of Contents 1 Overview 2 Equation 3 Main Content Overview of Maximum Initial Kinetic Energy Escape Work.

When the photoelectric effect occurs in the maximum initial kinetic energy, the kinetic energy of the electrons is different when they escape from the gravitational pull of the metal nucleus. The maximum value of kinetic energy when an electron on a metal surface absorbs a photon and escapes is called the maximum initial kinetic energy. After absorbing the energy of the photon, the escaped work electrons may move in all directions, some move to the inside of the metal, some move outward, due to the different distances, the energy lost when the electrons escape is different, so they leave the initial kinetic energy of the metal surface differently.

Only the initial kinetic energy of the electron flying directly from the surface of the metal is the largest, and the work done by the electron to overcome the gravitational pull of the nucleus is called the escape work of the metal. The work of escape is related to metallic materials.