A thin metal plate is exposed to solar radiation. The air and the surroundings are at 300C. The heat transfer coefficient by free convection from the upper surface of the plate is 17.4 w/m2K. The plate has an absorptivity of 0.9 at solar wavelength and an emissivity of 0.1 at the long wavelength. Neglecting any heat loss from the lower surface, determine the incident solar radiation intensity in kW/m2, if the measured equilibrium temperature of the plate is 500C. Stephen Boltzmann constant is 5.67´10–8 w/m2K4.