Question

P which among the following prevents radiation of heat in a thermos flask
A- vaccum space
B- silver space
C- insulated cover
D- double wall glass

Answer 1

Answer:

option b is correct answer

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Answer 2

Answer:

In the thermos flask the heat transfer is prevented by radiation, because it has a silver coating on the inner bottle. The convection prevents the heat because of the vacuum between the double walls. The thin layer made up of glass walls stops the heat transfer by conduction.