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What is Thermoflask?
A Thermos flask is commonly known as Vacuum Flask which is an insulating storage vessel that greatly increases the time over which its contents remain hotter or cooler than the flask's surroundings.
It does not allow heat transfer by any of the three means that heat can travel.
The silver coating on the inner bottle prevents heat transfer by ‘Radiation’, the thinness of the glass walls stops heat entering or leaving the flask by ‘Conduction’, and the vacuum between its double-wall prevents heat moving by ‘Convection’.
For better understanding, the diagram below shows a cross-section of a thermos.
Updated on: 10-Oct-2022
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