AIIMS 2001 Physics Temperature and Color of Stars MCQ Question

The temperature of a star is primarily determined by its color due to the relationship between temperature and the spectrum of light emitted by the star. This relationship is described by Wien's Displacement Law, which states that the wavelength at which the emission of a black body spectrum is maximized is inversely proportional to its temperature. In simpler terms, hotter stars emit light that is bluer, while cooler stars emit light that is redder. Therefore, the correct answer is B) colour.

A) Distance does not directly affect the temperature of a star; it only affects how we perceive its brightness.

C) Size can influence a star's luminosity but does not directly determine its temperature. Two stars of the same size can have different temperatures based on their composition and age.

D) None of these is incorrect as color is indeed a determining factor for temperature.