The radiation force experienced by body exposed to radiation of intensity `I`, assuming surface of body to be perfectly absorbing is:

…. radiation is emitted by hot bodies.

The radiation emitted by a perfectly black body is proportional to

The radiation emitted by a perfectly black body is proportional to

A metal surface is exposed to solar radiations

Consider a sphere of radius R exposed to radition of instensity I as shown in figure . If surface of sphere is partially reflection and reflection coefficient is 0.3, then radiation force experienced is :

What is black body radiation ?

Solar radiation is found to have an intensity maximum near the wavelength range of 470 nm . Assuming the surface of sun to be perfectly absorbing (a =1) , calculate the temperature of solar surface.