Suppose That Two Identical Stars (They Have the Same Total

question 48

Multiple Choice

Suppose that two identical stars (they have the same total light output) are located so that star A is at a distance of 5 pc, and star B is at a distance of 25 pc from Earth. How will star B appear, compared with star A?

• A) Star B will be 1/5 as bright as star A.
• B) Star B will be 1/25 as bright as star A.
• C) Star B will be 1/2.2 as bright as star A.
• D) Star B will be 1/20 as bright as star A.

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