A Spherical Black Body With A Radius Of 12cm Radiates 450 Watt, i. Power radiated, P1 = 450 watt. e. , Power, P ∝ T 4. ⇒ P = (4 π σ) r 2 T 4 = 450 ………………… (1) Therefore the option (D) is correct. We need to calculate the power radiated in watts. May 7, 2017 · Stefan-Boltzmann law- It states that the total radiant heat power emitted from a surface is proportional to the fourth power of its absolute temperature. If the radius were halved and the temperature doubled, the power radiated in watt would be :-. What would be the power of radiation if radius were to be halved and the temperature is doubled ? Apr 4, 2018 · A spherical black body with a radius of 12 cm radiates 450 watt power at 500 K. NTA Abhyas 2022: A spherical black body with a radius of 12cm radiates 450W power at 500K . 22aosni, 6icma, exd, wkuee, rh7pph, mo8p7, 1fsc, tej, nw, m0,