You mentioned the laser colours green and red, is there any other colours and what do they do?

Question: You mentioned the laser colours green and red, is there any other colours and what do they do?
- Keywords:
  colour,
  laser,
  light
Asked by annlouisa to Rob on 19 Mar 2012.
- Robert Thompson answered on 19 Mar 2012:
  
  Yeah, you can have every visible colour possible and some of the ones that aren’t. They all have different energies so if you think of the rainbowy Red, Orange, Yellow, Green, Blue, Indigo, Violet, red has least energy where as violet has the most and with more energy you can excite things more and make them do more things. But we are talking about things on a very very tiny level.

Question: You mentioned the laser colours green and red, is there any other colours and what do they do?