Both the apparent and absolute magnitude scales are logarithmic units:... - dofaq.co
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Both the apparent and absolute magnitude scales are logarithmic units:...

wikipedia - 28 Sep 2020
Both the apparent and absolute magnitude scales are logarithmic units: one whole number difference in magnitude is equal to a brightness variation of about 2.5 times[151] (the 5th root of 100 or approximately 2.512). This means that a first magnitude star (+1.00) is about 2.5 times brighter than a second magnitude (+2.00) star, and about 100 times brighter than a sixth magnitude star (+6.00). The faintest stars visible to the naked eye under good seeing conditions are about magnitude +6.

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