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10-2.Transmission of Heat
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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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