#### Question

The thermal radiation emitted by a body is proportional to T^{n} where T is its absolute temperature. The value of *n* is exactly 4 for

a blackbody

all bodies

bodies painted black only

polished bodies only

#### Solution

all bodies

From Stefan-Boltzmann law, the energy of the thermal radiation emitted per unit time by a blackbody of surface area *A* is given by `u = σAT^4` here , σ is Stefan-Boltzmann constant.

This law holds true for all the bodies.

Is there an error in this question or solution?

Solution The Thermal Radiation Emitted by a Body is Proportional to Tn Where T is Its Absolute Temperature. the Value of N is Exactly 4 for Concept: Qualitative Ideas of Blackbody Radiation.