Ionizing radiation is very harmful to the body. Radiation can cause cancer, fetal malformations and damage to human tissues and organs.
The transformer is a device that uses the principle of electromagnetic induction to change the alternating voltage. Its main components are the primary coil, secondary coil and iron core (magnetic core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc. According to the purpose, it can be divided into: power transformers and special transformers (electric furnace transformers, rectifier transformers, industrial frequency test transformers, voltage regulators, mining transformers, audio transformers, medium frequency transformers, high frequency transformers, impact transformers, instrument transformers, electronic transformers, reactor, transformer, etc.). Circuit symbols often use T as the start of the number. For example: T01, T201, etc.
What is the unit of value for radiation? What is the concept of μT?
The presence of radiation can cause ionization and cause cancer.
Ionization occurs when electrons are knocked out of their electron shell by ionizing radiation, making atoms positively charged. Since cells are made of atoms, ionization can cause cancer. A cell is made up of approximately billions of atoms. The likelihood of ionizing radiation causing cancer depends on the radiation dose rate and the body's susceptibility to receiving the radiation.
Terrestrial satellite communication stations, large power plants, transmission and energy transformation equipmentEnergy, high- and ultra-high-voltage transmission lines, subway trains and electric trains, and most household appliances can generate various shapes and frequencies. , sources of electromagnetic radiation of different strengths.
Detailed information:
1. Electromagnetic waves are composed of electric fields and magnetic fields that oscillate in phase and are perpendicular to each other. They move in the form of waves in space, and their direction of propagation is perpendicular to the plane formed by the electric fields and the magnetic fields. Effectively transfers energy and momentum.
2. Radar systems, television, mobile phone and radio transmission systems, radio frequency induction and medium heating equipment, equipmentmedical radio frequencies and microwaves, various electrical treatment equipment, subway trains and electric trains, and most household appliances. household appliances, etc. These are all sources of electromagnetic radiation that can produce various shapes, different frequencies and different intensities.
3. Electromagnetic radiation fills space, is colorless, odorless and invisible and can penetrate many materials, including the human body. If the human body is exposed to a radiation dose that exceeds safety for a long time, cells will be damaged or killed over a large area.
Baidu Encyclopedia - Radiation
http://zhidao.baidu.com/question/19997245.html?si=1 I found a relatively complete one on the unit Description of the application of μT. You can go see.
However, for radiological risks, it is obviously not precise enough to use this united to describe them. It will change the risk coefficient to. Gross, a feeling of alarmism.
A very simple truth: if a ball and a sail have the same momentum and hit a person with the same force, they will cause different degrees of damage even if they are in the same place!
This is equivalent to the concept of pressure. The energy (or force) carried per unit area is different. For general thermal radiation, the unit we use is W/cm², which is the power level received per unit area. For some, like solar power plants, we just need to know, but describe the damage, knowing that it is the case. always important. That doesn’t seem like enough!
In many places like nuclear power plants and mines, we use a unit of ionizing radiation, namely Gray Gy, which represents the energy absorbed by each kilogram of biological body, because some particles do not emitsnot even radiation. if they hit the human body, they will be deposited in the human body. Of course, it is for some high-energy particles that almost all the heat radiation energy such as induction cookers is deposited on the human body.
However, the photons of thermal radiation are all visible light and infrared rays, and some electronic displays can emit ultraviolet rays. Among these rays, with the exception of ultraviolet rays, which are more harmful to the human body, the other rays are mainly thermal. The human body is hot, and a large amount of infrared thermal radiation can burn people to death, just like the feeling of cooking food in a microwave oven. In this case, just use W/cm².
For high-energy light such as ultraviolet, passing through the human body is collision damage. The nature of particlesof photons in the energy range of x-rays and γ-rays is quite obvious. DNA and other molecules in the human body, leading to individual death, genetic variations, etc.