Suppose That Two Stars Are Identical in Every Way-For Example,same

question 133

Multiple Choice

Suppose that two stars are identical in every way-for example,same distance,same mass,same temperature,same chemical composition,and same speed relative to Earth-except that one star rotates faster than the other.Spectroscopically,how could you tell the stars apart?

• A)The faster rotating star has wider spectral lines than the slower rotating star.
• B)The faster rotating star will have an emission line spectrum while the slower rotating star will have an absorption line spectrum.
• C)The peak of thermal emission will be at a shorter wavelength for the faster rotating star than for the slower rotating star.
• D)There is no way to tell the stars apart spectroscopically,because their spectra will be identical.

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