The discussion centers around the possibility of lasers or photons colliding to produce matter, exploring both theoretical and experimental aspects of this concept. Participants examine the conditions under which such interactions might occur and reference historical events like the big bang.
Participants express varying views on the feasibility of lasers producing matter through collisions, with some supporting the idea based on theoretical grounds and others questioning the practicality or existing experimental evidence. The discussion remains unresolved regarding the specific conditions and implications of such interactions.
Limitations include the need for high photon density for matter production, the dependence on definitions of matter and energy, and the unresolved nature of the conditions under which black holes might form from laser interactions.
char20 said:We all know about particles colliding and producing various other particles plus energy i.e. EM radiation, but is the reverse possible? Is it be possible for laser beams to 'collide' and produce matter? Has this been done experimentally or is there a theoretical reason that it cannot happen?