The Star $\alpha$ Centauri C and the Star Groombridge 34 B Have the B

question 152

Multiple Choice

The star $\alpha$ Centauri C and the star Groombridge 34 B have the same apparent magnitude, but $\alpha$ Centauri C is 1.3 pc away from Earth and Groombridge 34 B is 3.5 pc away. What is the luminosity of Groombridge 34 B compared with $\alpha$ Centauri C?

• A) 2.7 times brighter
• B) 7.2 times fainter
• C) 2.7 times fainter
• D) 7.2 times brighter

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