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Michonne15
@Michonne15
January 2021
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Bonjour ! J'ai un exercice de Physique à faire assez rapidement ! Il n'est pas long mais je n'y arrive pas.. Pouvez-vous m'aider, s'il vous plaît?
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scoladan
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Bonjour,
1) 2,72 μm = 2,72.10^-6 m = 2720.10^-9 m = 2720 nm
2) non, le domaine du visible s'étend de 400 à 800 nm
3) Loi de Wien : λmax x T = 2,89.10^-3
==> T = 2,898/λmax = 2,89.10^-3/(2720.10^-9)
soit T = 1062,5 degré K
Soit en degrés C : T = 1062,5 - 273 = 789,5 degrés C.
1 votes
Thanks 1
Michonne15
Pour la troisième question, c'est des fractions les " / " ?
scoladan
oui
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Verified answer
Bonjour,1) 2,72 μm = 2,72.10^-6 m = 2720.10^-9 m = 2720 nm
2) non, le domaine du visible s'étend de 400 à 800 nm
3) Loi de Wien : λmax x T = 2,89.10^-3
==> T = 2,898/λmax = 2,89.10^-3/(2720.10^-9)
soit T = 1062,5 degré K
Soit en degrés C : T = 1062,5 - 273 = 789,5 degrés C.