The temperature of a furnace is 2327°C and the intensity is maximum in its radiation spectrum at 1200Å. If the intensity in the spectrum of a star is maximum at 4800Å, then the surface temperature of the star is
6500 K
6000 K
4800 K
7500 K
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Two bodies A and B at temperatures T1 K and T2K respectively have the same dimensions. Their emissivities are in the ratio of 1: 3. if they radiate the same amount of heat per unit time, then the relation between their temperatures is given by