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)`.

The radiancy of a black body is M_(e)=3.0W//cm^(2) . Find the wavelength corresponding to the maximum emmissive capacity of the body. b=2.9xx10^(-3)m.k , sigma=5.67xx10^(-2)K^(-4) .

Assuming a filament in a 100W light bulb acts like a perfect blackbody, what is the temperature of the hottest portion of the filament if it has a surface area of 6.3 xx 10^(-5) m^(2) ? The Stefan-Boltzmann constant is 5.67 xx 10^(-8) W //(m^(2).K^(2)) .

The tungsten filamet of an electric lamp, has a length of 0.25 m and a diameter of 6xx10^(-5) m. The power rating of the filament is 0.8, estimate the steady temperature of filament. Stefan's constant =5.67xx10^(-8) W//m^(-2)//K^(4) .

The value of Stefan's constant is sigma =5.76xx 10^(-8) J s^(-1) m^(-2)K^(-4). Find its value in cgs system.

A 10w electric bulb has tungsten filament of surface area 5 xx 10^(-5) m^2 . What is the temperature of the filament when incandescent ? Emissivity of the filament is 0.35 and Stefan's constant is 5.67 xx 10^(-8) Jm^(-2) s^(-1) k^(-4) .

A pinhole is made in a hollow sphere of radius 5cm whose inner wall is at temperature 727^(@)C . Find the power radiated per unit area. [Stefan's constant sigma=5.7xx10^(-8)J//m^(2)sK^(4) , emissivity (e)=0.2 ]

Calculate the temperature at which a perfect black body radiates at the rate of 1 W cm^(-2) , value of Stefan's constant, sigma = 5.67 xx 10^(-8) W m^(-2)K^(-4)

Calculate the temperature at which a perfect black body radiates at the rate of 1 W cm^(-2) , value of Stefan's constant, sigma = 5.67 xx 10^(-5) W m^(-2) K^(-8)