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Question
Which part of a thermos flask prevents loss of heat by radiation?
Which part of a thermos flask prevents loss of heat by radiation?
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Solution
The correct option is D Shiny, silvery wall
Though there is a vacuum in the thermos flask, radiation can take place as it does not require a medium. The shiny, silvery inner wall reflects the radiated heat and thus keeps the contents hot/cold.
Though there is a vacuum in the thermos flask, radiation can take place as it does not require a medium. The shiny, silvery inner wall reflects the radiated heat and thus keeps the contents hot/cold.
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