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Can a good insulator prevent radiation?

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+1 vote
in Food Processing Unit Operations by (110k points)
Can a good insulator prevent radiation?

(a) True

(b) False

This question was posed to me in semester exam.

My doubt is from Heat Radiation topic in portion Heat Transfer Theory of Food Processing Unit Operations

1 Answer

+2 votes
by (736k points)
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Best answer
Correct option is (a) True

The best explanation: Hot objects radiate infra-red electromagnetic waves, so therefore insulation against heat transfer by radiation is done by using reflective materials. The thermos bottle has a shiny material along with a lining to prevent heat conduction. This shiny material reflects heat from the radiation from inside as well as outside the bottle.

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