Nowadays, people are generally aware of the danger of direct exposure of our skin to the sun's rays.
Light is typically understood as that part of the electromagnetic spectrum that's visible to the human eye. It's an electromagnetic wave emitted by the sun and filtered by the atmosphere before reaching the ground. The wavelengths of visible light, i.e. the distance between the peaks in a series of waves, ranges from 400 nm to 700 nm. In addition to visible light, there is invisible radiation at either end of the light spectrum beyond which the human eye is unable to see.
In addition to ultraviolet radiation, at wavelengths below 390 nm, infrared radiation, at wavelengths above 760 nm, and high-energy visible (HEV) light, also known colloquially as blue light, can also be dangerous for our eyes. HEV light is a blue-violet light at wavelengths between 400 nm and 500 nm, so it falls on the spectrum of light that the human eye can see.