tiles


Note:  Do not rely on this information. It is very old.

Dichroism

Dichroism, in Crystalloejraphy, is that property of many crystals by which they appear of different colours when viewed in different directions. Certain fluids are also called dichroic when they are of different colours when viewed by transmitted or reflected light, or when the depth of the fluid is varied. These are more correctly known as fluorescent.