Do mirrors reflect ultraviolet light?

First, what reflects the light, whether it is UV, visible or IR wavelength, is the metal coating on the mirror. The reflectivity of various metals is indicated here: Page on www.layertec. read more

However, if the aluminum is on the Back Side of a piece of glass, the glass will absorb most of the UV light and therefore, No, a back-face mirror will not reflect much of the UV light. Unless the glass is special glass that has a a high transmissivity for UV. read more

If the mirror is made of glass, it won't reflect the all the UV light. This is a problem with making ICs, since the low wavelength lasers needed for modern ICs can't be reflected with a plain glass mirror. read more

Aluminum mirror is better for UV, silver and gold mirror is better for IR,especially near IR. Both Aluminum and silver mirror is good for visible. read more