A) \[1:256\]
B) \[1:64\]
C) \[1:4\]
D) \[1:16\]1
Correct Answer: A
Solution :
From Stefans law, the total radiant energy emitted per second per unit surface area of a black body is proportional to the fourth power of the absolute temperature (T) of the body. i.e., \[E=\sigma {{T}^{4}}\] where o is Stefans constant. Given, \[{{T}_{1}}={{27}^{o}}C=27+273=300\,K\], \[{{T}_{2}}={{927}^{o}}C=1200\,K\] \[\therefore \] \[\frac{{{E}_{1}}}{{{E}_{2}}}=\frac{{{(300)}^{4}}}{{{(1200)}^{4}}}=\frac{1}{256}\]
You need to login to perform this action.
You will be redirected in
3 sec
