Question

Heat and Its Transfer
Q.J
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Read the given description of the experimental setup carefully and
answer the following questions:
Raman set up a glowing bulb and a metal ball that was painted black in a box,
at some distance from each other. The box was set up in such a manner that it has no ar
it (it has vacuum).
After some time the metal ball was heated due to the glowing bulb.
1. Even after maintaining vacuum in the box, what might have caused the metal ball to
heat up?
2.
Raman wrote the conclusion of the experiment as 'black colour of the ball, aided the
process of heating'. Justify the conclusion written by Raman.
3.
How is the phenomenon that caused the metal ball to heat up, applied in the following
situations:
a) In cold regions, to keep the houses warm
b) By firemen
c) Electric hot plates
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Answer 1

Answer:

in cold regions to keep the house warm

Answer 2

Answer:

a. in cold regions to keep house warm