If the temperature of a black body be increased from ${27^o}C$ to ${327^o}C$ the radiation emitted increases by a fraction of
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(a) $\frac{{{E_2}}}{{{E_1}}} = \frac{{T_2^4}}{{T_1^4}} = {\left( {\frac{{237 + 227}}{{273 + 27}}} \right)^4} = {\left( {\frac{{600}}{{300}}} \right)^4} = 16$
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