Infrared ray is a kind of invisible light, in the spectrum of the low-frequency band, the wavelength between 700nm and 1mm, due to the longer wavelength, better penetration, there are a lot of many applications in life.

Infrared remote control: the use of infrared linear propagation characteristics, you can carry out short-range remote control operations, such as television, air conditioning remote control.

Night vision devices: infrared light into visible light, you can observe the environment at night. Police night vision device on the use of infrared for night surveillance.

Infrared alarm: the use of infrared sensors to detect intruders, can be used for home alarm systems.

Infrared thermometer: detection of infrared light emitted by the object to measure its surface temperature. Such as medical thermometers, industrial thermometers.

Infrared oven: the use of infrared heating food, infrared can be directly heated inside the food, cooking speed, less loss of nutrients.

Infrared imaging: the use of infrared light to shoot images of the night or fog environment, for military reconnaissance, search and rescue.

Infrared communiction: The use of infrared rays for short-distance wireless communication. Such as TV remote control, mobile payment, etc.

Infrared distance measurement: the use of infrared light to measure the distance between objects. For example, camera autofocus is to use infrared ranging sensor.

Infrared paint: Some paints add infrared absorbing or reflecting materials, which can regulate the infrared absorption rate of the building and be used for heat preservation or refrigeration.

Therefore, infrared in life and industry has a very wide range of applications, is a very USEFUL electromagnetic wave.