Low temperature physics. Professor George Pickett with his cryostat,used to create ultra-low temperatures. In June 1993,Pickett and his team at Lancaster University managed to cool a small piece of copper to 7 microkelvin,just seven millionths of a degree above 'absolute zero' and a new world record. Absolute,or thermodynamic,zero is the point at which an object has no heat at all,and is near minus 273.15 degrees Celsius. The lowest natural temperature is 2.7 kelvin (-270.5 Celsius),the heat of radiation left behind by the Big Bang,found in the deepest recesses of outer space. Pickett and his team use these temperatures to study superconductors and superfluidity | |
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Credit: | Science Photo Library / Parker, David |
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