Spectroscopic and eclipse duration observations of an eclipsing binary star can enable astronomers to calculate________ of its individual stars.
a. the masses
b. the sizes
c. the masses and sizes
d. neither masses nor sizes
Question 2Which of the waves below has the shortest wavelength?
a. gamma rays
b. X-rays
c. visible light
d. infrared
e. radio
Question 3Groombridge 34 is an M1 V star. Based on this information, which of the following are true? I. Groombridge 34 has a surface temperature that is less than the Sun. II. Groombridge 34 has a mass that is greater than that of the Sun. III. Groombridge 34 is less luminous than the Sun. IV. Groombridge 34 is located near the middle of the H-R diagram.
a. I & II
b. II & IV
c. I & IV
d. I & III
e. II & III
Question 4Which of the items below is electromagnetic radiation?
a. gamma rays
b. X-rays
c. visible light
d. radio
e. All of the other choices are correct.
Question 5Vega is an A0 V star. Based on this information, which of the following are true? I. Vega has a surface temperature less than the Sun. II. Vega has a mass that is greater than that of the Sun. III. Vega is more luminous than the Sun. IV. Vega is located in the upper left-hand corner in the H-R diagram.
a. I & II
b. II & III
c. II, III, & IV
d. I, II, & III
e. I, II, III, & IV
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