Gujarati
Hindi
10-2.Transmission of Heat
normal

The intensity of radiation emitted by the sun has its maximum value at a wavelength of $510\,nm$ and that emitted by the north star has the maximum value at $350\,nm$. If these stars behave like black bodies, then the ratio of thesurface temperature of the sun and north star is

A

$1.46$

B

$0.69$

C

$1.21$

D

$0.83$

Solution

$\frac{{{T_S}}}{{{T_N}}} = \frac{{{{({\lambda _N})}_{\max }}}}{{{{({\lambda _S})}_{\max }}}} = \frac{{350}}{{510}} = 0.69$

Standard 11
Physics

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