A thermos flask is polished well. | vedclass

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Question

(D) The inner and outer surfaces of a thermos flask are polished to minimize heat transfer by radiation. $A$ polished surface is a poor absorber and a

Vedclass · Accepted Answer

To reflect all radiations from outside

Vedclass · Answer

(D) The inner and outer surfaces of a thermos flask are polished to minimize heat transfer by radiation. $A$ polished surface is a poor absorber and a good reflector of thermal radiation. Therefore,by polishing the surfaces,the flask reflects all incoming radiation from the outside and prevents the internal heat from radiating out,thereby maintaining the temperature of the contents.

$A$ thermos flask is polished well.

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