Two identical objects A and B are at temperatures TA and TB respectively. Both objects are placed in a room with perfectly absorbing walls maintained at a temperature T (TA > T > TB). The objects A and B attain the temperature T eventually. Select the correct statements from the following:(i) A only emits radiation, while B only absorbs it until both attain the temperature T(ii)A loses more heat by radiation than it absorbs, while B absorbs more radiation than it emits, until they attain the temperature T(iii) Both A and B only absorb radiation, but do not emit it,until they attain the temperature T (iv) Each object continues to emit and absorb radiation even after attaining the temperature T
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a
(i, iii)
b
(i, ii)
c
(ii, iii)
d
(ii, iv)
answer is D.
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Detailed Solution
STATEMENTS ii) , iv) are true according to Prevost's theory.
Two identical objects A and B are at temperatures TA and TB respectively. Both objects are placed in a room with perfectly absorbing walls maintained at a temperature T (TA > T > TB). The objects A and B attain the temperature T eventually. Select the correct statements from the following:(i) A only emits radiation, while B only absorbs it until both attain the temperature T(ii)A loses more heat by radiation than it absorbs, while B absorbs more radiation than it emits, until they attain the temperature T(iii) Both A and B only absorb radiation, but do not emit it,until they attain the temperature T (iv) Each object continues to emit and absorb radiation even after attaining the temperature T