Question

how can heat loss through radiation be reduced in vacuum flask explain with a diagram

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Answer 1

Answer:

Thermos flask - example

It consists of a glass vessel with double walls. ... The outer surface of the inner wall and the inner surface of the outer wall are silvered (shining). The shining surfaces reduce heat loss due to radiation. An insulating stopper (cork) is used to close the mouth of the vessel.

Answer 2

Answer:

The silver coating on the inner bottle present heat transfer by radiation and the vacuum between its double well prevents heat moving by convection the thickness of the glass wells stops heat interesting or leaving the flask by conduction the case surrounds the flask provides addition insulation