$Assertion :$ For higher temperature the peak emission wavelength of a blackbody shifts to lower wavelengths.
$Reason :$ Peak emission wavelengths of a black body is proportional to the fourth-power of temperature.
AIIMS 2005, Easy
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According to Wein’s displacement law, $\lambda _mT = constant$ Naturally, when $T$ increases $\lambda _m$ decreases. $\lambda _m$ is peak emission wavelength and $E = \sigma T^4$ Here, $E$ is energy being radiated per unit area per unit time.
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