Thane_Bitter Correct, in optics, we use glancing mirrors with DeepUV/X-Ray. Have a look see at what ASML is doing with Steppers (My old line of work and research). Coatings of fractions of given wavelengths are used to better reflect. Deep UV is absorbed in normal optics. Past X-Ray I don’t even know the other involved, never came close to that.
And yes, a small number of humans can resolve more colors. There are sea critters that see with more color receptors and said to be able to see twice the colors we see.
UV for me is a ghostly, cloud colored medium light gray.
Light is normally reemitted from a shorter wavelength absorbed, and then a lower energy level emits a longer wavelength. That is how CFL and LED lamps work; they use UV to produce more visible light, which is fluorescence.
We have a saying about optics, at every interface (suck as air to water, or gas to glass), R.A.T.S. occurse. Reflection, Absorption, Transmission, and Scattering occurs to varying degrees. In some cases, transmission might occur for only a wavelength thickness, but technically, they all occur.
This is in your inside rearview works night and day settings. The mirror reflects off the front of the glass at night and during the day, off the rear reflective surface. The two surfaces are not parallel, but more of a slight wedge.
