Reading this PE questioncan-we-transport-energy-over-infinite-distances-through-vacuum-using-light,a related question arises naturally:
Is energy transported (by light)? -- (I did believed in thisanswer until now) or energy is already 'in site' (vacuum) justexpecting to be excited by the photons?
This news insinuated the doubt anti-laser(1)
The antilaser does the reverse: Two perfect beams of laser lightgo in, and are completely absorbed.
If vacuum is able to absorb energy then it can do the reverse,and supply energy. We are already prepared to accept that vacuumhas energy.
I am inclined to accept that energy do not travel at all. Whatis travelling is the excitation of vacuum, and we call this:photons. It may appear a question of semantics, but I think thatthe explicit reconaissance of this notion can be helpful.
(1) The two rays entering the slab are in phase opposition whenthey met, and cancel. The nature of cancelation was obscure to me,until now.
added:
I googled this: \"where goes the energy in a destructiveinterference\" and followed past answers to this question. Someoneanswered \"into the surrounding environment.\" We are in minority;)Most of the times they said that the total extinguishing isimpossible. This anti-laser experiment shows that energy isdestroyed.
We see the same effect with sound cancelation , with boat wake(trailing waves) cancelation (by double/triple hull or when theysail in formation), and now with light.
added after 2 answers
image from astro-canada.ca
What is amazing is that this fact is inside the theory since thebegining, quoting from there:
In 1801, the British physicist Thomas Young demonstrated thatlight propagates as waves, like waves on the surface of water.Young understood that when two light waves meet, they interact witheach other. Scientists call this