question_answer

Two black bodies at temperatures \[\text{327}{{\,}^{\text{o}}}\text{C}\]and \[\text{427}{{\,}^{\text{o}}}\text{C}\]are kept in an evacuated chamber at \[\text{27}{{\,}^{\text{o}}}\text{C}\] The ratio of their rates of loss of heat are

A)  \[\frac{6}{7}\]                                  

B)  \[{{\left( \frac{6}{7} \right)}^{2}}\]

C)  \[{{\left( \frac{6}{7} \right)}^{3}}\]                         

D)  \[\frac{243}{464}\]