Sunlight divided into three spectra:
UV radiation
UV radiation is sunlight with the shortest wavelength - up to 380 nm. Due to absorption from the atmosphere, only the parts above 300 nm reach us. (UVB and UVA bands) UV light is invisible to the human eye.
Visible light
The visible part of sunlight has wavelengths from 380 nm to 780 nm. The rainbow spectrum shows the details of the sunlight that is "white" to us.
Infrared radiation
This is the invisible part of sunlight with wavelengths from 780 nm to 2500 nm. Infrared light represents the heating part of the sunlight.

