A Cepheid Variable Star with a Pulsation Period of a Few

question 142

Multiple Choice

A Cepheid variable star with a pulsation period of a few days is seen in the spiral arm of a galaxy. Its apparent brightness is measured as 10⁴ times fainter than an equivalent star 1000 ly away from the Sun in the Milky Way Galaxy. Assuming no light absorption between galaxies, how far away is the more distant Cepheid?

• A) 10⁷ ly (10⁴ times farther away)
• B) 10,000 ly (10 times farther away)
• C) 10 ly (100 times closer)
• D) 100,000 ly (100 times farther away)

Understand the basic principles of Keynesian and Classical macroeconomic theories.

Comprehend the relationship between aggregate demand, aggregate supply, and their impact on employment and output.

Identify the different ranges of the aggregate supply curve and their implications for economic policy.

Describe the causes and outcomes of the Great Depression according to Keynesian theory.

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