What is a spectroscopic binary?
A. a visual binary in which one or both stars have peculiar spectra
B. A spectroscopic binary looks, to us on Earth, like a single star, but its spectrum shows double lines that shift.
C. a visual binary for which we have spectra of both stars
D. a visual binary that is shown by its spectrum to be a single star
Answer: B
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a. True b. False Indicate whether the statement is true or false
What is the kinetic energy of a proton moving at 0.8000 c? The rest energy of a proton is 938.3 MeV.
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