Suppose a Cepheid Oscillates from an Initial State 1 to a State

question 181

Multiple Choice

Suppose a Cepheid oscillates from an initial state 1 to a state 2 where its radius has decreased 10 percent, and its temperature has increased 10 percent compared with the values at state 1. How do the luminosities at states 1 and 2 compare?

• A) They are the same.
• B) The luminosity is greater at position 1.
• C) The luminosity is greater at position 2.
• D) It is not possible to compare the luminosities with the information given.

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