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Two large parallel planes with emissivities of 0.3 and 0.5 are maintained at tures of 5270 C and 1270C respectively. A radiation shield having emissivities

Two large parallel planes with emissivities of 0.3 and 0.5 are maintained at tures of 5270 C and 1270C respectively. A radiation shield having emissivities of on both sides is placed between them. Calculate (i) Heat transfer rate between them shield. (ii) Heat transfer rate between them with shield

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