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 the infrared?
However shining a red laser the beam is not visible in the calcite at all and with a purple laser the beam shows as red within the crystal. Strange.
However shining a red laser the beam is not visible in the calcite at all and with a purple laser the beam shows as red within the crystal. Strange.
