Explain (I) Stefan's law and (ii) energy distribution of black body.

Show graphical representation of energy distribution spectrum of perfectly black body.

State and explain Stefan's law of radiation.

I st law can explain

According to stefan's law of radiation a black body radiates energy sigmaT^(4) from is unit surface area every second where T is the surface temperature of the black body and sigma = 5.67 xx 10^(-8) W//m^(2) K^(4) is known as Stefan's of as a ball of radius 0.5m When detonated it reaches temperature of 10^(6)K and can be treated as a black body Estimate the power it radiates .

If the filament of a 100 W bulb has an area 0.25cm^2 and behaves as a perfect block body. Find the wavelength corresponding to the maximum in its energy distribution. Given that Stefan's constant is sigma=5.67xx10^(-8) J//m^(2)s K^(4) .

Statement : The energy radiated per unit volume , i.e., energy density in block body radiation depends upon the temperature . Explanation : Green light in never emitted in black body radiations .

Black body radiation is white and a hole in the cavity of a radiator is a black body. Explain.