* Question
| What is the photoelectric effect |
* Answer
| Light illuminates certain substances, causing changes in the electrical properties of the substance.This phenomenon of photo-interference is collectively referred to as the effect of the photoelectric effect on the surface of a metal that emits electrons under the action of light. The emitted electrons are called photoelectrons.There is also a contradiction with the volatility of light, that is, the transient nature of the photoelectric effect. According to the volatility theory, if the incident light is weak, the irradiation time is longer, and the electrons in the metal can accumulate enough energy to fly out of the metal.surface.The photoelectric effect was discovered by the German physicist Hertz in 1887. It played a fundamental role in the development of quantum theory. Under the illumination of light, the phenomenon of electrons in an object is called Photoelectric effect.
Photoelectric effects are divided into photoelectron emission, photoconductivity and photovoltaic effects.In the photoelectric effect, the electron emission direction is not completely oriented, but most of them are emitted perpendicular to the metal surface. Regardless of the illumination direction, the light is an electromagnetic wave, but the light is a high-frequency oscillating orthogonal electromagnetic field, and the amplitude is small, and it is not correct.The direction of electron injection has an effect. |
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