Physics - Heat & Thermo Question with Solution | TestHub

Two identical plates P and Q, radiating as perfect black bodies, are kept in vacuum at constant absolute temperatures ${\mathrm{T}}_{\mathrm{P}}$ and ${\mathrm{T}}_{\mathrm{Q}}$, respectively, with ${\mathrm{T}}_{\mathrm{Q}}<{\mathrm{T}}_{\mathrm{P}}$, as shown in Fig. 1. The radiated power transferred per unit area from P to Q is $W_0$. Subsequently, four more plates, identical to P and Q, are introduced between P and Q, as shown in Fig.2. Assume that heat transfer takes place only between adjacent plates. If the power transferred per unit area in the direction from P to Q (Fig.2) in the steady state is $W_S$, then the ratio $\frac{{\mathrm{W}}_0}{{\mathrm{W}}_{\mathrm{S}}}$ is $\_\_\_\_$.