Which one of the following objects,all initially at the same temperature,will be most efficient in losing heat?
A)a dull black box in vacuum
B)a dull black box in air
C)a box with an emissivity of 0.1
D)a polished silver box in air
E)a polished silver box in vacuum

Question

Quizplus · Accepted Answer

A dull black box in air will be most efficient in losing heat because dull black surfaces are good emitters of radiation, and the presence of air allows for additional heat loss through convection, making it more efficient in losing heat compared to the other options.

Which One of the Following Objects,all Initially at the Same