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GATE ME 2016 Set 3 — Question 52

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NAT+2 / -0MediumRadiation ExchangeRadiationHeat Transfer

Heat Transfer → Radiation → Radiation Exchange

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Two large parallel plates having a gap of 10 mm in between them are maintained at temperatures T1=1000 KT_1 = 1000\text{ K} and T2=400 KT_2 = 400\text{ K}. Given emissivity values, ϵ1=0.5,ϵ2=0.25\epsilon_1 = 0.5, \epsilon_2 = 0.25 and Stefan-Boltzmann constant σ=5.67×10−8 W/m2-K4\sigma = 5.67 \times 10^{-8}\text{ W/m}^2\text{-K}^4, the heat transfer between the plates (in kW/m2^2) is __________
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