Lisou Posted January 12, 2018 Share Posted January 12, 2018 Salut salut, si quelqu'un peut m'expliquer ce QCM, dont je ne comprends pas du tout la correction.. Merci Quote Link to comment Share on other sites More sharing options...
Solution La_Reine_Rouge Posted January 12, 2018 Solution Share Posted January 12, 2018 Bonjour, Tu sais que Emittance énergétique (ou luminance) est proportionnelle à la T^4. Si T est multiplié par 2, alors emittance et luminance sont multipliés par 2^4 = 16 Donc A faux, B et C vrais. Ensuire Lambda(max) = constante / T, donc si tu as 2*T tu divises lambda par 2 donc D faux. Et E faux c'est ortho Dac ? Quote Link to comment Share on other sites More sharing options...
Lisou Posted January 12, 2018 Author Share Posted January 12, 2018 D'accord, c'est plus clair, merci Quote Link to comment Share on other sites More sharing options...
La_Reine_Rouge Posted January 12, 2018 Share Posted January 12, 2018 Avec plaisir, bon courage ! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.