If We Could See the Last Few Seconds of the Collapse

question 6

Multiple Choice

If we could see the last few seconds of the collapse of a star to form a black hole,we would see the star grow steadily redder.Why?

• A)The star moves away from us at an increasing speed
• B)The star grows steadily cooler
• C)The star's gravitational redshift increases
• D)The star becomes obscured by more and more interstellar dust

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