How many times brighter is a star with an apparent magnitude of +1.0 than a star with an apparent magnitude of +6.0?
A) 100 times brighter
B) 5 times brighter
C) The question is incorrectly worded; the magnitude +6 star will be 100 times brighter than the magnitude +1 star.
D) 2.512 times brighter

Question

Quizplus · Accepted Answer

The apparent magnitude scale is logarithmic, with a difference of 5 magnitudes corresponding to a brightness factor of 100. A star of magnitude +1.0 is therefore 100 times brighter than a star of magnitude +6.0.

How Many Times Brighter Is a Star with an Apparent