Why do things get sun bleached through a window but you don’t get a sunburn when sitting near a window?

Question

Why do things get sun bleached through a window but you don’t get a sunburn when sitting near a window?

In: Chemistry

Answer 1

Ultraviolet rays are broken down into two types: UVB and UVA. Normal windows block most UVB rays which are the ones responsible for sunburn. However, they still let in UVA rays, which can still cause bleaching.