You know a lot about the electromagnetic radiation environment that can be seen everywhere

Electromagnetic radiation is the transmission of momentum and energy in the form of waves in space by co oscillating, mutually perpendicular electric and magnetic fields, with the propagation direction perpendicular to the plane composed of electric and magnetic fields. The interaction between electric and magnetic fields produces electromagnetic waves that emit or propagate into the air to form electromagnetic radiation.

Electromagnetic radiation consists of electrical and magnetic energy transmitted in space and is generated by the motion of electric charges. For example, moving charges emitted by RF antennas that transmit signals can generate electromagnetic energy.

Electromagnetic compatibility (EMC)=electromagnetic emission (EMI)+electromagnetic immunity (EMS).

The electromagnetic "spectrum" includes various electromagnetic radiation, from extremely low frequency electromagnetic radiation to extremely high frequency electromagnetic radiation. Between them are radio waves, microwaves, infrared rays, visible light, and ultraviolet rays. The general definition of the radio frequency portion of the electromagnetic spectrum refers to radiation having a frequency of about 300 to 300 GHz. Some electromagnetic radiation has certain effects on the human body.