Neodymium doped Glass changes colors, depending on the wavelength of the light hitting it.

Neodymium doped Glass changes colors, depending on the wavelength of the light hitting it.
Neodymium doped Glass changes colors, depending on the wavelength of the light hitting it.
Neodymium doped Glass changes colors, depending on the wavelength of the light hitting it.
Neodymium doped Glass changes colors, depending on the wavelength of the light hitting it.

hitting