[tex]Dane:\\f = 50 \ Hz = 50\frac{1}{s}\\v = 340\frac{m}{s}\\Szukane:\\\lambda = ?\\\\Rozwiazanie\\\\\lambda = v\cdot T\\\\T = \frac{1}{f}\\\\to\\\\\lambda = \frac{v}{f}\\\\\lambda = \frac{340\frac{m}{s}}{50 \ Hz} = \frac{340\frac{m}{s}}{50\frac{1}{s}}\\\\\boxed{\lambda = 6,8 \ m}[/tex]
