A Block of Ice

Remember concepts with our Masterclasses.

80k Users

60 mins Expert Faculty Ask Questions

Can radiate as well as absorb heat

Cannot radiate heat

Is an example for a black body

Is an example for a white body

Ready to Test Your Skills?

Check Your Performance Today with our Free Mock Tests used by Toppers!

detailed solution

Correct option is A

Absolute temperature of ice block T = (0+273) = 273K. Rate of radiation from the surface of a block of iceQr=eσAT4where e= emissivity of the surface of ice block.When radiation from surrounding (at temperature T0) is incident on the surface of ice block, rate of absorptionQa=aσAT04where 'a' = absorptivity of the surface so option - (1) is correct.according to Prevost theory of heat exchange any substance above 'O' K emits as well as absorb heat with the surrounding.

Talk to our academic expert!

Create Your Own Test
Your Topic, Your Difficulty, Your Pace

Similar Questions

Two identical objects A and B are at temperatures T_A and T_B respectively. Both objects are placed in a room with perfectly absorbing walls maintained at a temperature T (T_A > T > T_B). 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

View solution