Question

Temperature of the star is determined by

(a) distance

(b) colour

(c) size

(d) none of these.

Answer 1

Correct option (b) colour

Explanation :

From Wien's displacement law that λ_mT = b, where λ_m = wavelength of light emitted with maximum intensity.

T = Temperature of the star

From the colour (wavelength) of the emitted light, we can determine the temperature of the star.