Which of the Following Statements About Spectroscopic Binary Stars Is

question 25

Multiple Choice

Which of the following statements about spectroscopic binary stars is FALSE?

• A) visually we can only see one star
• B) some of the lines in the spectrum are double, with the spacing changing over time
• C) an analysis of the ways the lines in the spectrum change allows us to calculate the star's distance directly
• D) we can use the spectrum to determine the sum of the masses of the two stars
• E) we can often use the changes in the positions of the spectral lines to measure the radial velocity of the stars in the system

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Tactics or methods aimed at directly changing or influencing external events or circumstances to meet one's goals or needs.

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Psychological strategies that involve changing the external world to match one's goals and desires.