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

Question

Quizplus · Accepted Answer

The Answer of 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

Type I Supernovae Have an Absolute Magnitude of -20