Timeline for Can nonimaging optics concentrate heat to a higher temperature than the source? [closed]

11 events

when toggle format	what		by	license	comment
Oct 25 at 13:36	history	closed	Bob D Miyase Jon Custer		Needs more focus
Oct 25 at 11:47	review	Close votes
Oct 25 at 13:36
Oct 25 at 10:11	history	edited	timblack1	CC BY-SA 4.0	Added guess about the reason no "hot spot" was visible, and a method for testing this reason
Oct 25 at 9:59	history	edited	Qmechanic♦		edited tags
Oct 25 at 9:59	comment	added	timblack1		@JohnRennie I edited the question to add the definition you requested. The system might not be reversible to the extent the jar's internal mirrored surface is more reflective and less absorptive than the black dot inside the jar.
Oct 25 at 9:59	history	edited	Qmechanic♦		edited tags
Oct 25 at 9:55	history	edited	timblack1	CC BY-SA 4.0	Added link to Wikipedia non-imaging optics page, made explicit the jar's mirrored interior & internal black body are non-imaging optical components
Oct 25 at 5:31	comment	added	John Rennie		Any form of reversible optics suffers from the same problem that if light rays can travel in reverse the hotter side will heat the cooler side so the image can never be hotter than the object. You need to define what you mean by "non-imaging optics" and why whatever system you mean might not be reversible.
Oct 25 at 4:56	history	edited	timblack1	CC BY-SA 4.0	Corrected minor grammatical error
S Oct 25 at 4:54	review	First questions
Oct 25 at 5:31
S Oct 25 at 4:54	history	asked	timblack1	CC BY-SA 4.0