Figure 12-14(for the Following Questions)

question 60

Multiple Choice

  Figure 12-14(for the following questions)
Examine the accompanying graph. Harlow Shapley did not know that there are two categories of Cepheid variables; he was only familiar with those such as d Cepheii. Because of this, some of the Cepheid variables he observed ____.

• A) were dimmer than he expected
• B) were brighter than he expected
• C) had a longer pulsation period than he expected
• D) had a shorter pulsation period than he expected
• E) were RR Lyrae variables

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