Twa large paral el grey plates with a small gap, having net radiation exchange at the rate of 1000 W/m when their emissivities are 0.5 each. When one of the plates emiss vity is reduced to 0.1Swithout any change in their temperature, the new rate of heat exchange shall become; a. 300 Wm a. 500 vm

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.