If the sun's surface radiates heat at `6.3 xx 10^(7) Wm^(-2)`. Calculate the temperature of the sun assuming it to be a black body `(sigma = 5.7 xx 10^(-8)Wm^(-2)K^(-4))`

The sun radiates energy at the rate of 6.4xx10^(7)Wm^(-2) . Calculate its temperature assuming it to be a black body.

The solar energy received by the Earth persquare metre per minute is 8.315 xx 10^(4)Jm^(-2)min^(-1) . If the radius of the Sun is 7.5 xx 10^(5) km and the distance of the Earth from the Sun is 1.5 xx10^(8) km, calculate the surface temperature of Sun. Assume the Sun as a perfect black body. Given that Stefen constanta sigma = 5.7 xx 10^(-8)Wm^(-2)K^(-4).

If each square cm of the sun's surface radiates energy at the rate of 6.42xx10^(3) Js^(-1) cm^(-2) , calculate the temperature of the sun's surface in degree celsius, assuming Stefan's law applies to the radiation. (Stefan's constant = 5.67xx10^(-8)Wm^(-2)K^(-4) )

Calculate the amount of radiation of a black body at 400K temperature. (sigma= 5.67 xx 10^-8 watt//m^2 //k^4)

The power of a black body at temperature 200K is 544 watt. Its surface area is (sigma = 5.67 xx 10^(-8) wm^(-2) K^(-4))

The power of black body at temperature 200 K is 544 W .Its surface area is (sigma=5.67xx10^(-8)Wm^(-2)K^(-2))