A 15 cm black disk is placed halfway between two black 3 m diameter disks which are

Question:

A 15 cm black disk is placed halfway between two black 3 m diameter disks which are 7 m apart with all disk surfaces parallel to each other. If the surroundings are 0 K, determine the temperature of the two larger disks required to maintain the smaller disk at 540?C.GIVENA black disk (A1) halfway between two other black disks (A2 & A3)Diameter of A1 (D1) = 15 cm = 0.15 mDiameter of A2 and A3: (D2 = D3) = 3mDistance between A2 and A3 (2L) = 7mSurrounding temperature (T??) = 0 KTemperature of A1 (T1) = 540?C = 813 KASSUMPTIONSA2 and A3 are at the same temperature (T2 = T3)Steady stateconditions