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petitepharmacienne
Go to solution Solved by Takemichi,

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Bonjour, je n'arrive pas a répondre à et item, et je ne comprends pas non plus la correction.. si quelqu'un peut me venir en aide!!

 

Une source orthotrope de 0,5 m2 en calotte sphérique à une distance de 2 m doit avoir une luminance de 40 000 cd/m2 pour obtenir l’éclairement souhaité.

 

correction: FAUX : angle solide = surface / distance2 = 1/8 sr. Il faut donc 80 000 cd/m2.

 

d'où sort ce 1/8 sr ? 😐

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