What are the ranges of visible light and ultraviolet light?

The wavelength of visible light is between 400 and 760nm.

The wavelength of ultraviolet light is 10-400 nm.

Visible light is the part of the electromagnetic spectrum that can be perceived by the human eye. There is no precise range in the visible spectrum; the wavelength of electromagnetic waves that the average human eye can perceive is between 400 and 760nm, but some people can perceive it. Electromagnetic waves with wavelengths approximately between 380 and 780nm.

Ultraviolet light is a general term for radiation with wavelengths from 0.01 to 0.40 microns in the electromagnetic spectrum, which cannot cause human vision. Radiation with a wavelength of 0.01~0.4 microns in the electromagnetic spectrum, ranging from the visible violet end to X-rays. Has sterilizing function.

Extended information:

Visible light application

Remote sensing technology

Visible light remote sensing (visible spectral remote sensing) means that the working band of the sensor is limited to visible light Remote sensing technology within the band range (0.38 ~ 0.76 microns).

The wavelength range of the visible light region of the electromagnetic spectrum is approximately between 0.38 and 0.76 microns, which is the most commonly used working band in traditional aerial photographic reconnaissance and aerial photographic surveying. Because the color sensitive range of photosensitive film is exactly within this wavelength range, black-and-white full-color or color images with very high ground resolution and interpretation and mapping capabilities can be obtained. However, due to the extreme limitations of solar illumination conditions and the emergence of infrared photography and multi-band remote sensing, visible light remote sensing has extended its working band to the near-infrared region (about 0.9 microns). The imaging method has also developed from single photography to include black and white photography, infrared photography, color photography, color infrared photography, multi-band photography and multi-band scanning, and its detection capabilities have been greatly improved. Visible light remote sensing, aerospace photogrammetry marked by the application of frame-type aerospace cameras, has great potential for development.

Communication technology

Visible light communication technology uses high-speed light and dark flashing signals emitted by fluorescent lamps or light-emitting diodes that are invisible to the naked eye to transmit information. Connect the signal to be transmitted to the lighting device, add a photoelectric conversion device at the front end of the receiving end, plug in the power plug and drive the lighting device to work. Systems made using this technology can transmit information while lighting indoors, so they have broad development prospects.

Reference materials: Baidu Encyclopedia --- visible light Baidu Encyclopedia --- ultraviolet light