Water is (broadly) transparent to optical frequencies, but opaque in ultraviolet and mid-far infrared. (graph)
Human flesh is (broadly) opaque in the optical frequencies, but transparent in the X-Ray frequencies
Would it be possible for a material to have a uniformly high or loss transparency across the whole frequency spectrum?
- If yes, then do we know of any materials that have those properties?
- If no, why? What would it mean?