What is absolute zero level in temperature ? Is it an ideal only ?

It is 0k or -273 degree celsius. but it said it differs from element to element as temperatures of -300 and less than that have also been recorded.

Yes there can be anything without any heat energy as heat energy is the average kinetic energy of the body.

No, nothing can be at absolute zero. Reason: to be in this state, the element atoms should have no vibration at all. To SEE the atom in this state, you have to shine a light on it. The momentum if the light will disturb the atom .... (and move it.. so it no longer is at absolute zero).

There are other reasons too in the lines of entropy.. but i am avoiding the "academically correct" yada yada.


@Pranav -  -300 degrees celcius was NEVER recorded anywhere! (if it was, show us an example here).

Temperatures as low as few nano Kelvins were reached.

Absolute zero is negative two hundred and seventy three degrees Celsius, or zero degrees Kelvin.  It is the temperature at which all things stop moving (all atoms cease vibration).  It is an ideal.  We have managed to reach very low temperatures, but we can not reach absolute zero for a simple reason.  One of the most basic laws of thermodynamics is that heat is transferred from molecule to molecule to try to reach the median temperature.  This is why if you put an ice cube in soup the soup gets colder and the ice cube melts.  So, if we were ever to reach absolute zero it would have to mean that all of the universe had also reached absolute zero . . . does that make sense?