[tex]Dane:\\f = 4 \ Hz\\v = 2\frac{m}{s}\\Szukane:\\\lambda = ?\\\\Rozwiazanie\\\\\lambda = v\cdot T\\\\ale \ \ f = \frac{1}{T}\\\\\lambda = \frac{v}{f}\\\\\lambda = \frac{2\frac{m}{s}}{4 \ Hz} = \frac{2\frac{m}{s}}{4 \frac{1}{s}}\\\\\boxed{\lambda = 0,5 \ m}[/tex]
Odp. Długość tej fali wynosi 0,5 m.
