Q. In determining the temperature of a distant star, one makes use of
A) Kirchhoff’s law
B) Stefan’s law
C) Wien’s displacement law
D) None of the above
Explanation
(c) Star emits thermal radiations these radiations are a mixture of wavelengths and bear the following relation, with temperature $(T)$ as
$\lambda_{m}T$= constant
Where $\lambda_{m}$ is maximum wavelength. This is Wien’s displacement law and is used in determining the temperature of stars.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.