A Black Hole with a Mass of 10⁹ MSᵤn Brightens

question 56

Multiple Choice

A black hole with a mass of 10⁹ MSᵤn brightens rapidly and increases its luminosity by a factor of two.Approximately how long would it take for an observer on Earth to see the black hole reach its maximum brightness?

• A) 3 minutes
• B) 3 hours
• C) 3 days
• D) 3 weeks

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