Mirrors are typically a glass substrate coated with a thin layer of a metal that is highly reflective in the wavelength region the mirror is designed for. For instnace, your bathroom mirror is likely a piece of window glass that has a very thin layer ( a couple of microns thick) of silver evaported on to it. Silver is very reflective in the visible band - the band of light our eyes see. But the coatings aren't 100% reflective so a little bit of the incident light energy gets absorbed. The absorption process has to do with the light exicting electrons in the metal, causing them to move. Before some of the electrons can radiate back any enery, they collide with other atoms in the metal and give up that energy as heat. So a little light is lost to the mirror as heat.

I don't know if that's right but that's what google gave me.

Doesn't it 'REFLECT' and not absorb? They're different, right?

There is only visible light, which is not absorbed by mirrors.

I don't understand how you can title this as 'for the high IQ's' when you had t google it and simply posted it with no questions or queries...

im pretty sure that mirror surfaces obsorb no light because they reflect it all

I would say stop asking the community for your homework

But i thought mirrors do not absorb light they just reflect 100% of it :/ #when i went to school x