$Assertion :$ A body that is good radiator is also a good absorber of radiation at a given wavelength.
$Reason :$ According to Kirchhoff’s law the absorptivity of a body is equal to its emissivity at a given wavelength.
$Reason :$ According to Kirchhoff’s law the absorptivity of a body is equal to its emissivity at a given wavelength.
AIIMS 2005, Easy
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According to Kirchoff’s law
$\frac{{{e_\lambda }}}{{{e_\lambda }}} = {E_\lambda }$
Here, $E_{\lambda }$ is emissivity of black body which is constant, so, ${e_\lambda } \propto {a_\lambda }$ . It means good emitter are good absorber of radiation.
$\frac{{{e_\lambda }}}{{{e_\lambda }}} = {E_\lambda }$
Here, $E_{\lambda }$ is emissivity of black body which is constant, so, ${e_\lambda } \propto {a_\lambda }$ . It means good emitter are good absorber of radiation.
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