Question

There obujects coloured black, gray and white can withstand hostile condition upto `2800^(@)C` These object are throw into a farance where each of them attanit a temperature of `2800^(@)C` Which object will glow brightess?
A. The white object
B. The black object
C. All glow with equal beightness
D. Gray object

Answer 1

Correct Answer - b
An idea black body absorbs all the radiation incident upon it and has an emissivity equal to i. ,If a black body and an identical another body are kept at the same temperature then the black body will radius maximum power hence the black object at a temparature of `2000^(@)C` will glow brightnest.