Vega 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
Question 2
What statement below best describes the behavior of light encountering the objective lens of a refracting telescope?
a. All light is absorbed as it travels through a dense, transparent material.
b. White light from astronomical objects is emitted by the lens.
c. Light rays are focused to form an image after they pass through the lens.
d. Light rays are focused to form an image after they reflect off the lens.
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