Question

The light emitted by the Sun has the maximum wavelength of 570 nm. The light emitted by another star has the maximum wavelength of380nm.What is the ratio of the surface temperature of the star and the Sun ?

1) 2/3    2) 3/2     3) 3/4     4) 5/3


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Answer 1

As per wien's displacement law,

w=b/t

here,

w=wavelength

b=wien's constant

t=temperature

W star/W sun=T sun/T star

T sun/T star=380nm/570nm

T star/T sun=570nm/380nm

T star/T sun=3/2