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v air = 1.500 m/s
Dit: λ....?
Peny: v = λ.f ⇔ λ = v : f ⇒ λ = 1.500 : 300 ⇒ λ = 5 meter
v = 1.500 m/s
Dit : λ = ?
v = fλ
1500 = 300 . λ
5 m = λ