Dan P nous apporta ses lumieres ainsi en ce 2004/04/23 19:46... :

> <snip>
> I just had a thought: the real question here is, "Is the function of 
> an albedo value linear?" If we were to plot it on a graph from zero to 
> one, would the line be straight or curved? If straight, you we can 
> relate the values to each other using percentages. If not, we cannot.

Albedo is linear. A planet with an albedo of 0.50 reflect 50% (2/4) of 
the incident lignt, albedo 0.25 mean 25% (1/4) of incident light, albedo 
0.75 = 3/4.

Alain

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