how is the light that comes out of the sun different from light that comes out of lightbulbs?

Question

for instance, how come we’re told to wear sunscreen in broad natural day-light but not artificial light like indoors?

In: 4

Answer 1

We use sunscreen to protect ourselves from ultraviolet light, a wavelength that is just beyond the visible part of the spectrum. The sun produces much more ultraviolet light than a lightbulb does. Ultraviolet light has a shorter wavelength and therefore more energy than visible light; it is therefore able to cause the kind of damage to our skin that causes sunburn and, potentially, skin cancer.