I have a whole host of questions I've been saving up and maybe it's time to start throwing out one a day. I understand they do sometimes give people pause to have to think about an answer so here goes:
Laser diodes emit light at very specific frequencies i.e. 532nm, 640nm, 473nm, 405nm etc. Yet, there always seems to be concern for, and measurement of, or talk about "escape from the case", of infrared which... to my understanding... is invisable light (frequency) up past the 700's. (I'm not geeky enough to know the actual frequency.)
If a laser is only supposed to be producing a specific frequency, then how are we getting infrared from everything and... what is the average percentage of the visable color versus the presumably more dangerous invisable infrared that's being emitted?