What Is the Difference Between a Type I Cepheid (δ

question 186

Multiple Choice

What is the difference between a Type I Cepheid (δ Cephei star) and a Type II Cepheid (W Virginis star) ?

• A) Type I Cepheids are main-sequence stars, while Type II Cepheids are giant stars.
• B) Type I Cepheids are short-period variables, while Type II Cepheids are long-period variables.
• C) Only Type I Cepheids have a simple relationship between luminosity and period.
• D) Type I Cepheids are brighter metal-rich stars, while Type II Cepheids are dimmer metal-poor stars.

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