Transmission Of Heat Question 221
Question: The ratio of energy of emitted radiation of a black body at $ 27^{o}C $ and $ 927^{o}C $ is
[Pb. PMT 1995; CPMT 1997, 2000; CBSE PMT 2000; DPMT 1998, 02, 03]
Options:
A) 1 : 4
B) 1 : 16
C) 1 : 64
D) 1 : 256
Show Answer
Answer:
Correct Answer: D
Solution:
$ \frac{Q _{1}}{Q _{2}}={{( \frac{T _{1}}{T _{2}} )}^{4}}={{( \frac{273+27}{273+927} )}^{4}}={{( \frac{1}{4} )}^{4}}=\frac{1}{256} $
BETA
