Two bodies A and B have emissivities 0.5 and 0.8 respectively. At some temperature the two bodies have maximum spectral emissive powers at wavelength `8000 Å` and `4000 Å` respectively. The ratio of their emissive powers at these temperatures is :

Two stars emit maximum radiation at wavelength 3600 Å and 4800 Å respectively. The ratio of their temperatures is

Two stars emit maximum radiation at wavelength 3600 Å and 4800 Å respectively. The ratio of their temperatures is

Two stars emit maximum radiation at wavelength 3600 Å and 4800 Å respectively. The ratio of their temperatures is

Two stars A and B radiate maximum energy at wave lengths 4000Å and 5000Å respectively. The ratio of their temperature will be-

Two stars A and B radiate maximum energy at wave lengths 4000Å and 5000Å respectively. The ratio of their temperature will be-

Two stars A and B radiates maximum energy at 3600 Å and 4200 Å, respectively. Then the ratio of their temperature is

Two bodies A and B have thermal emissivities of 0.01 and 0.81 respectively. The outer surface areas of the two bodies are same. The two bodies emit total radiant power at the same rate. The wavelength lambda_B corresponding to maximum spectral radiancy from B is shifted from the wavelength corresponding to maximum spectral radiancy in the radiation from A by 1.0 mum . If the temperature of A is 5802 K, calculate (a) the temperature of B, (b) wavelength lambda_B .

Two bodies A and B have thermal emissivities of 0.01 and 0.81 respectively. The outer surface areas of the two bodies are same. The two bodies emit total radiant power at the same rate. The wavelength lambda_B corresponding to maximum spectral radiancy from B is shifted from the wavelength corresponding to maximum spectral radiancy in the radiation from A by 1.0 mum . If the temperature of A is 5802 K, calculate (a) the temperature of B, (b) wavelength lambda_B .