A body which is radiating energy such as the sun has a wavelength where it has maximum energy emission (λm) that is given by, where T is temperature, P is pressure :
λmT = Constant
Wien's displacement law states that the wavelength of maximum emission of a black body is inversely proportional to its absolute temperature.
λm = b/T, so λmT = b, where b ≈ 2898 μm K is Wien's constant.
For the Sun at about 5800 K this gives λm ≈ 0.5 μm (visible light), while for the Earth at about 288 K it gives about 10 μm (infrared).
Pressure does not enter the law, and a ratio λm/T would wrongly make the peak wavelength increase with temperature.
Hence, λmT = Constant.
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.................... is a client server application that identifies each host on the internet with a unique user-friendly name.
Every OS has a ................ or .......... which primarily resides in the main memory of the computer to perform some of the basic functions of the OS.
(i) Kernel
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