Has anybody noticed that if you shine a cheap green laser through rhombic calcite (Iceland Spar) you can see the red in the beam. Calcite is famous for splitting light into two but what is going on? Am I seeing an interpretation of the infrared? Or is it unrelated?
However shining a red laser, the beam is not visible in the calcite at all and with a purple laser the beam shows a faint red within the crystal. If anybody can tell me what is going on I would love to know.
However shining a red laser, the beam is not visible in the calcite at all and with a purple laser the beam shows a faint red within the crystal. If anybody can tell me what is going on I would love to know.