Being in the sun is fun, but you need to know:
Ultraviolet (UV) radiation is part of the electromagnetic (light) spectrum that reaches the Earth from the sun. It has wavelengths shorter than visible light, making it invisible to the naked eye.
Ultraviolet A {UVA} is the longer wave UV ray that can cause lasting skin damage, skin aging, and skin cancer.
Ultraviolet B {UVB} is the shorter wave UV ray that can cause sunburns, skin damage, and skin cancer.
Ultraviolet C {UVC} is the shortest and highest energy UV with wavelengths less than 290 nm. However, since it is filtered by the ozone, these wavelengths do not reach the Earth’s surface and do not contribute to skin damage in humans.