An ideal black body at room temperature is th | vedclass

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Question

(A) Initially,an ideal black body absorbs all the radiant energy incident on it,making it appear as the darkest object in the furnace.According to Kir

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Initially it is the darkest body and at later times the brightest.

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(A) Initially,an ideal black body absorbs all the radiant energy incident on it,making it appear as the darkest object in the furnace.According to Kirchhoff's law of radiation,a good absorber is also a good emitter. Therefore,as the black body heats up to the temperature of the furnace,it radiates the maximum amount of energy compared to other bodies at the same temperature.Once the black body reaches thermal equilibrium with the furnace,it emits the most intense radiation,making it appear the brightest.

An ideal black body at room temperature is thrown into a furnace. It is observed that:

Similar Questions

If between wavelength $\lambda$ and $\lambda + d\lambda$,$e_\lambda$ and $a_\lambda$ are the emissive and absorptive powers of a body,respectively,and $E_\lambda$ is the emissive power of a perfectly black body,then according to Kirchhoff's law,which of the following is true?

What are heat rays?

Write a short note on the Greenhouse Effect.

We consider the radiation emitted by the human body. Which of the following statements is true?

According to Kirchhoff's law,the ratio of emissive power to absorptive power for all bodies is:

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