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UnkleRhaukusBest ResponseYou've already chosen the best response.1
yeah, negative energies and LASERs
 2 years ago

UnkleRhaukusBest ResponseYou've already chosen the best response.1
dosent make much sense to me at the moment
 2 years ago

Vibhor16Best ResponseYou've already chosen the best response.1
There is no such thin as negative temperature/energy.We just take a measurement as standard limit and if the temperature/energy is below the standard limit it is represented in negative.For example:standard limit of temperature is 0 degree Celsius(freezing point of water) but for scientific use we take kelvin(+273).
 2 years ago

Ricardo_95Best ResponseYou've already chosen the best response.1
Negative temperature is a statistical mechanical concept  for more information see the book Física Molecular of Kikoin and Kikoin
 2 years ago

UnkleRhaukusBest ResponseYou've already chosen the best response.1
ok so ive done a lil bit of research, and it turns out that when there is an inversion layer (the electrons are more likely to be in the excited state ) this is called negative temperature. it kinda makes sense because heat will flow from the specie at negative temp. It gets a bit confusing when you also have a high energy state (positive temp), because the high energy state will be receiving the heat flow form the negative temperature specie. If a specie is in a negative temperature state it effectively has more energy that any positive state. Without negative temperature , LASERs would not be possible
 2 years ago
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