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→Exercice avancé
== Exercice avancé ==
== Exercice avancé ==
{{traduction}}
You may have noticed that the LED brightness seems to fade slowly, but increases quickly. This is because our eyes interprets brightness logarithmically ([http://www.telescope-optics.net/eye_intensity_response.htm la loi de Weber]), while the LED’s brightness changes linearly, that is by the same amount each time. How do you solve this problem? (Hint: what is the opposite of the logarithmic function?)
You may have noticed that the LED brightness seems to fade slowly, but increases quickly. This is because our eyes interprets brightness logarithmically ([http://www.telescope-optics.net/eye_intensity_response.htm la loi de Weber]), while the LED’s brightness changes linearly, that is by the same amount each time. How do you solve this problem? (Hint: what is the opposite of the logarithmic function?)