ThermodynamicsHard
Question
Three objects colored black, gray and white can withstand hostile conditions upto2800oC. These objects are thrown into a furnce where each of them attains a temperature of 2000oC. Which object will glow brightest ?
Options
A.the white object
B.the black object
C.all glow with equal brightness
D.gray object
Solution
Black has greatest emissivity and greatest absorbity as compared with colours. At2000oC .it will have greatest emissivity so it will glow brightest.
Create a free account to view solution
View Solution FreeMore Thermodynamics Questions
On mixing 1 gm mole of a monoatomic with 1 gm mole of a diatomic gas the specific heat of mixture at constant volume wil...If 10 gm ice at 0oC is mixed with 10 gm water at 20oC, the final temperature will be :-...When you make ice cubes, the entropy of water...A mass of a gas at 0o C is expanded adiabatically so that its volume becomes 4 times the original the temperature of gas...10 mole of an ideal gas is undergoing the process shown in the figure. The heat involved in the process from $P_{1}$ to ...