Question

Estimate the surface temperature of a star if the radiation it emits has a maximum instensity at a

wave length of 446 nm. What is the intensity radiated by the star?​

Answer 1

Explanation:

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Answer 2

Answer:

A radiating star can be regarded as a radiating blackbody. A blackbody radiates wavelengths from zero to infinity. Different wavelengths of blackbody radiation have different intensities that only depend on the temperature of the body (see blackbody radiation curve). The wavelength of maximum intense radiation (lambda)is inversely proportional to its temperature(T). According to Wien's displacement law lambda*T= 0.288cm-K. This law is here used to calculate temperature of the star by using the its wavelength of radiation. Note the wavelength given here is that of maximum intense radiation. From this temperature Stefan Boltzman law which relates the temperature of a blackbody and intensity of its radiation, is used to calculate intensity of this radiation.. For better understanding of blackbody radiation consult any good book on quantum mechanics.