GK
THE UNIVERSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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temperature
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brightness
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size
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mass
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Detailed explanation-1: -The surface temperature of a star determines the color of light it emits. Blue stars are hotter than yellow stars, which are hotter than red stars.
Detailed explanation-2: -According to Wien’s law, the peak wavelength of a blackbody spectrum is inversely related to its temperature. The color of a star is indicative of where the peak wavelength of its spectrum is located, so color can indicate to us the temperature of a star. Bluer stars are hotter, whereas red stars are cooler.
Detailed explanation-3: -Measure the brightness of a star through two filters and compare the ratio of red to blue light. Compare to the spectra of computer models of stellar spectra of different temperature and develop an accurate color-temperature relation.