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A vertical temperature scale shows the cryogenic region, highlighted from absolute zero up to about 90 kelvin, with key points where gases like oxygen, nitrogen, hydrogen, and helium liquefy, alongside temperature conversions between kelvin, Celsius, Fahrenheit, and Rankine.
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Italian physicist Guglielmo Marconi at work in the wireless room of his yacht Electra, c. 1920.
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A vertical temperature scale shows the cryogenic region, highlighted from absolute zero up to about 90 kelvin, with key points where gases like oxygen, nitrogen, hydrogen, and helium liquefy, alongside temperature conversions between kelvin, Celsius, Fahrenheit, and Rankine.
cryogenic region The cryogenic temperature range.

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cryogenics, production and application of low-temperature phenomena. The cryogenic temperature range has been defined as from −150 °C (−238 °F) to absolute zero (−273 °C or −460 °F), the temperature at which molecular motion comes as close as theoretically possible to ceasing completely. Cryogenic temperatures are usually described in the absolute or Kelvin scale, in which absolute zero is written as 0 K, without a degree sign. Conversion from the Celsius to the Kelvin scale...

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