If the subsystem of a main system is considered isolated from it,the nucleus can have a negative temperature. That's what Ramsey in 1956 put forwarded.
The negative temperature on a whole system is an invalid idea,where as for certain cases,its possible.
Ramsey's experiments shows that possibility. For normal purposes only the positive temperatures are possible.
The negative temperatures are more hotter than positive ones. At higher temperatures the specific heat,which is the heat energy supplied to increase a degree kelvin,becomes approximately zero or gets nullified. Or a very very small energy s needed to increase the temperature into infinity. This allows us to form the negative temperature scale too. Remember,this is only valid for isolated subsystems within crystals,lattices
As it is not a significant thing in normal physical universe,I am not going further.
The negative temperature on a whole system is an invalid idea,where as for certain cases,its possible.
Ramsey's experiments shows that possibility. For normal purposes only the positive temperatures are possible.
The negative temperatures are more hotter than positive ones. At higher temperatures the specific heat,which is the heat energy supplied to increase a degree kelvin,becomes approximately zero or gets nullified. Or a very very small energy s needed to increase the temperature into infinity. This allows us to form the negative temperature scale too. Remember,this is only valid for isolated subsystems within crystals,lattices
As it is not a significant thing in normal physical universe,I am not going further.
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