At temperature T , the power radiated by a body is Q watts . At the temperature 3 T the power radiated by it will be

A black body at a high temperature T radiates energy at the rate of E. When the temperature falls to T/2,the radiated energy will be

A spherical black body with radius 12 cm radiates 640 w power at 500 K. If the radius is halved and the temperature doubled, the power radiated in watts would be

A spherical black body with radius 12 cm radiates 450 w power at 500 K. If the radius is halved and the temperature doubled, the power radiated in watts would be

A spherical black body with radius 12 cm radiates 640 w power at 500 K. If the radius is halved and the temperature doubled, the power radiated in watts would be