What is the peak wavelength of radiation emitted by a black body at temperature `40^@C` (b =`2.898 xx 10^-3 mK`)

The maximum wavelength of radiation emitted by a black body at 1227 ^@C is Am. What is its maximum wavelength at 2227 ^@C ?

If a black body is heated from 27 ^@C to 927 ^@C , then the ratio of the radiation emitted by the body at the two temperatures will be

Calculate the value of lambda_max for solar radiation assuming that surface temperature of Sun is 5800 K (b = 2.897 xx 10^-3 mK ). In which part of the electromagnetic spectrum, does this value lie?

A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm is U_(1) , at wavelength 500 nm is U_(2) and at 1000 nm is U_(3) , Wien's constant, b=2.88xx10^(6) nm K, which of the following is correct ?

Solar radiation emitted by sun resembles that emitted by a black body at a wavelength of about 4800 overset @ (A) ,. If the sun were to cool down from 6000K to 3000K then the peak intensity would occur at a wavelength

If the surface temperature of the sun is assumed to be 6150 K, find the wave length of maximum intensity in the sun’s radiation taking Wien's constant 2.88 xx 10^-3mk .

Calculate the energy radiated is one minutes by a black body of surface area 400cm^2 ,when it is maintained at 127^@C .

A small blackened solid copper sphere of radius 2.5cm is placed in an evaculated chamber. The temperature of the chamber is maintained at 100^@C . At what rate energy must be supplied to the copper sphere to maintain its temperature at 110^@C . ( sigma = 5.76 xx 10^-8 Js^-1m^-2K^-4 ) Treat sphere as black body.

The plots of intensity versus wavelength for three black bodies at temperatures T_1,T_2 and T_3 respectively are as shown. Their temperature are such that