The maximum wavelength of radiation emitted by a black body at 1227°C is λm. What is its maximum wavelength at 2227°C?
$\dfrac{ λm}{2}$
$\dfrac{ λm}{3}$
$\dfrac{3}{5}λm$
$\dfrac{9}{25}λm$
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A black body radiates energy at the rate of E watt m–2 at a temperature of T Kelvin. When the temperature is reduced to T/2 Kelvin, the radiant energy will become