1433523
Description
Flashcards by Narjes Yahiaoui, updated more than 1 year ago
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Created by Narjes Yahiaoui
about 10 years ago
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| Question | Answer |
| La relation entre la fréquence , la période T et lambda | f = 1/T T=1/f lambda= VxT = V/f |
| si a< lambda | L'onde se propage après la fente selon plusieurs directions : diffraction |
| si λ < a < 10 lambda λ | Diffraction limitée sous forme de cône θ = largeur demi angulaire de la diffraction sin θ= λ / a <=> θ =sin⁻¹(λ/a) si θ ≤ 0,4 rad sin θ ≅ θ =λ/a |
| si a > 10 λ | PAS DE DIFFRACTION |
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