Question

[
begin{array}{l}
text { Qe } e^{pi^{4}}
frac{Q_{1}}{Q_{2}}=frac{operatorname{li}_{1}^{4}}{ln ^{5} T_{2}^{4}}=frac{1(T)^{4}}{frac{1}{4}(2 T)^{4}}=frac{T^{4}}{4 T^{4}}
therefore Q_{2}=4 Q_{1}
end{array}
]
Ophon ( (therefore D) ) 4 ( Q )

# 5. The rate of dissipation of heat by a black body at temperature T is Q. What will be the rate of dissipation of heat by another body at temperature 2T and emissivity 0.25 ? (1) 16 Q (2) 4Q (3) 8Q (4) 4.50

Solution