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c = 3x10⁸ m/s
λ _?
c = f.λ
λ = c/f
λ = 3x10⁸ / 10⁵
λ = 3x10³m
f = 10⁵ Hz
Ditanyakan : Panjang gelombang (λ)
Dijawab :
Kecepatan cahaya = v = 3x10⁸ m/s
Jadi panjang gelombang :
λ = v/f
= 3x10⁸ /10⁵
= 3x10³ m
= 3000 m