Two thermometers A and B exposed to sunlight. The value of A is painted black but that of B is not painted. The correct statement regarding this case is

(a) Temperature of B will rise faster
(b) Temperature of A will remain more than B
(c) Both of A and B show equal rise from the beginning
(d) Temperature of A will rise faster than B but the final temperature will be same in both

Question

Arun · Answer

The thermometer A which is painted black will show a high temperature that is more than that of thermometer B. b.) Hence, we can conclude that the dull black surface is a good absorber of heat than any bright shiny surface. Any dark colour is a good radiator of heat and hence will become hotter than the other one.

Vikas TU · Answer

a.) The thermometer A which is painted black will show a high temperature that is more than that of thermometer B. b.) Hence, we can conclude that the dull black surface is a good absorber of heat than any bright shiny surface. Any dark colour is a good radiator of heat and hence will become hotter than the other one.

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