Two spherical black bodies A and B are emitting radiations at same rate. The radius of B is doubled keeping radius of A fixed. The wavelength corresponding to maximum intensity becomes half for A white it ramains same for B. Then, the ratio of rate radiation energy emitted by a and is B is

Two black bodies A and B at temperatures 5802 K and 1934 K emits total radiations at the same rate. The wavelength lamda_(B) corresponding to maximum spectral radiancy from B is shifted from the wavelength corresponding to maximum spectral radiancy in the radiation from A by 1.00mum . Then

A spherical black body of radius n radiates power p and its rate of cooling is R. then.

A spherical black body of radius n radiates power p and its rate of cooling is R. then.

Two stars A and B of same size, have thermal emissivities of 0.2 and 0.64 respectively. Both stars emit total radiant power at same rate. If the temperature of A is 5000 K and the wavelength lamda_(B) corresponding to maximum spectral radiancy in the radiation from B is shifted from the wavelength corresponding to maximum spectral radiancy in radiations from A by 2.0 mu m, then find the temperature of star B and wavelength lamda_(B) .

The thermal emissivitites of two bodies A and B are in the ratio of 1//e . The outer surface area of the bodies are same and they radiate the energy at the same rate. Find the ratio of the wavelength corresponding to the maximum spherical radiance in the radiation from A to maximum spectral radiance in the radiation from B .