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Question
The shining surface in a thermos flask decreases the outgoing heat by ______.
Options
radiation
white
conduction
blue
convection
bad conductor
good conductor
black
reflection
Solution
The shining surface in a thermos flask decreases the outgoing heat by reflection.
Explanation:
A shiny surface, like silver or polished metal, reflects the infrared radiation (heat) back into the flask rather than allowing it to escape. This reduces heat loss through radiation, helping the flask maintain its temperature for a longer period.
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Explain the working of thermos flask.
Vacuum flask is also called as ______.
The vacuum flask was invented by Scottish scientist ______.
In a thermos flask, the vacuum between the two walls prevents heat from the inside to the outside by radiation.
What is the function of the silvered wall in a thermos flask?
