At a high temperature,a body emits radiation | vedclass

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(D) According to Kirchhoff's law of radiation,a body is a good absorber of those wavelengths which it emits at a given temperature. Since the body emi

Vedclass · Accepted Answer

$\lambda_1, \lambda_2, \lambda_3,$ and $\lambda_4$

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(D) According to Kirchhoff's law of radiation,a body is a good absorber of those wavelengths which it emits at a given temperature. Since the body emits radiation of wavelengths $\lambda_1, \lambda_2, \lambda_3,$ and $\lambda_4$ at a high temperature,it will also absorb the same wavelengths when radiation of these wavelengths falls on it at a lower temperature. Therefore,the body will absorb all the wavelengths $\lambda_1, \lambda_2, \lambda_3,$ and $\lambda_4$.

At a high temperature,a body emits radiation of wavelengths $\lambda_1, \lambda_2, \lambda_3,$ and $\lambda_4$ only. At a lower temperature,which of the following wavelengths will it absorb?

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