Why will produce radiation, which appliances will produce radiation

All objects in nature, as long as the temperature in the absolute temperature above zero, are in the form of electromagnetic waves constantly transmit heat to the outside, this way of transmitting energy is called radiation. The energy released by an object through radiation is called radiant energy.

Radiation has an important characteristic, that is, it is "reciprocal". No matter how high or low the temperature of the object (gas) is radiated outward, the object A can be radiated to the object B, while B can also be radiated to A. This is different from conduction. This is different from conduction, which is unidirectional.

In our living environment, radiation is everywhere!

Household appliances: TV, refrigerator, air conditioning, microwave ovens, vacuum cleaners, etc.

Office equipment: cell phones, computers, photocopiers, electronic instruments, medical equipment, etc.

Home decoration: marble, laminate flooring, wallpaper, paint, etc.

Peripheral environment: high-voltage lines, power substations, TV (radio) signal towers,

Natural environment: sunspots, etc.