Main Question or Discussion Point
If you shine two lasers at the same spot that are the same frequency, and; exactly out of phase; would there still be energy at the one spot they are pointed at?
Just curious why you would think, without interference, that it would be anything other than double?Ah, I see, so I will rephrase the question; if we shine two lasers with equal frequency, at the same spot and they don't interfere with each others path, what could the energy at that one spot be?
Well, I would think it wouldn't be double, maybe if the lasers interfered constructively then I would say the energy would increase, but two lasers on the same spot without any interference, that doubles? This is a new topic for me so I'd like to look into it a bit more, is there any reference for the energy being double?Just curious why you would think, without interference, that it would be anything other than double?
Elsewhere is the short answer. The best one might do to exactly overlap two destructively canceling beams is likely feeding two ports of a 4 port beam splitter. In this case all the power would exit one port while none would go out the other (canceling one). Beam splitters conserve energy so it all balances when the numbers are worked.If it less, then where did the non-absorbed energy go?
Ah, this is interesting,Even if the 2 beams do interfere with each other destructively, the energy absorbed by the target should still be the sum of the 2 beams.
If it less, then where did the non-absorbed energy go?