Which detection method or methods measure the gravitational
Which detection method or methods measure the gravitational
Subject: Physics / General Physics
Question
1. Which detection method or methods measure the gravitational tug of a planet on its star, allowing us to estimate planetary mass? (B)
A. the transit method only B. the Doppler method only C. the astrometric and Doppler methods
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2. What is the transit method of finding extrasolar planets? (C)
A. monitoring a star to detect periodic dips in its brightness from the planet passing in front of the star
B. measuring the spectrum of the star for a periodic variation in its Doppler shift
C. monitoring a star to detect periodic dips in its brightness from the planet passing behind the star
D. observing a star during the rare occasion of another star passing directly in front of it; slight changes in how the light is bent by gravity can indicate the presence of planets around the closer star
3. How does a hot Jupiter differ from Jupiter? (A)
A. It’s much more massive.
B. It has a much longer year.
C. It’s much closer to its star.
4. Star X has an apparent magnitude of 3, and star Y has an apparent magnitude of 13. How do they compare in observed brightness? (D)
A. Star X is 10 times brighter than star Y.
B. Star Y is 10,000 times brighter than star X.
C. Star X is 10,000 times brighter than star Y.
D. Star Y is 10 times brighter than star X.
