If you sit outside and get a sunburn, what type of electromagnetic waves are to blame?

Ultraviolet rays are the type of electromagnetic radiation which are responsible for causing sunburn.

Ultraviolet rays are the type of electromagnetic radiation which are responsible for causing sunburn. Melanin is a pigment that protects our body from ultraviolet radiation. When we get exposed to excess UV light, our body responds by producing excess melanin, which causes the tan on our bodies or sunburn. Hope i helped!