AIIMS 2001 Physics Color and Temperature of Stars MCQ Question

The color of a star primarily depends on its temperature due to the relationship described by Wien's Displacement Law, which states that the wavelength of the peak emission of a black body is inversely proportional to its temperature. This means that hotter stars emit light at shorter wavelengths, appearing blue, while cooler stars emit light at longer wavelengths, appearing red. Luminosity and brightness are related concepts but do not directly determine the color of a star. Luminosity refers to the total amount of energy emitted by a star per unit time, while brightness is the amount of light received from a star at a distance. Therefore, the correct answer is B) temperature.