Type I Supernovae Have an Absolute Magnitude of −20

question 15

Multiple Choice

Type I supernovae have an absolute magnitude of −20.If you discover a Type I supernovae in a distant galaxy that has an apparent magnitude of 22,then how far away is this galaxy?

• A)0.3 Mpc
• B)40 Mpc
• C)1,200 Mpc
• D)2,500 Mpc
• E)3,500 Mpc

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