Is the light emitted by the money detector ultraviolet or infrared

The light emitted by the money detector is ultraviolet light.

This infrared energy is not enough, because ultraviolet rays excite the phosphors on the banknotes. Although ultraviolet rays are invisible light, they can react with fluorescent substances. The light emitted by the money detector can reflect the fluorescent substances on the money, so the light emitted by the money detector is ultraviolet, but not completely.

Ultraviolet (UV) is a general term for radiation with a wavelength of 0.0 1-0.40 micron (between visible UV and X-ray) in the electromagnetic spectrum, which cannot cause human vision. Ultraviolet rays also have physiological functions, such as sterilization, disinfection, treatment of skin diseases, rickets and so on. Ultraviolet rays have strong particle properties and can produce photoelectric effects on various metals.

Extended data

The frequency range of ultraviolet rays is 7.51014hz ~ 51016hz, which is outside the visible violet spectrum and invisible to human eyes. The main feature of ultraviolet ray is its strong chemical action, which is easy to make photographic film sensitive.

Ultraviolet rays have a strong physiological function and can kill bacteria.

Apply the fluorescence effect of ultraviolet rays to prevent counterfeiting. In addition to using this effect in the money detector, we can also use the characteristics that different substances will emit different colors of fluorescence under ultraviolet radiation to identify ancient paintings, and we can use ultraviolet photography. There are ultraviolet rays in the light emitted by high-temperature objects such as the sun, arc lamps and gas discharges such as mercury. For example, the light emitted by fluorescent lamps also contains ultraviolet rays.