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Originally Posted by janoskiss
It does not work like that. It is a logarithmic scale.
+1 magnitude = (2.5) times the brightness
+2 magnitude = (2.5 x 2.5) = 2.5^2 = 6.25 times the brightness
+3 magnitude = (2.5 x 2.5 x 2.5) = 2.5^3 = 15.625 times the brightness
+N magnitude = 2.5^N times the brightness
+0.1 magnitude = 2.5^0.1 = 1.096 times the brightness
So we are talking about 10% difference in the amount of light per surface area on the retina. Barely noticeable for most people.
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Could you clear something up for me? The eyes sensitivity is also logarthmic so do I "Percieve" a differnce of 2 in magnitude as 5 times different or 6.25 time brighter?