[tex]Dane:\\f = 41,2 \ MHz = 41,2\cdot10^{6} \ Hz=0,412\cdot10^{8} \ Hz\\c = 3\cdot10^{8}\frac{m}{s}\\Szukane:\\\lambda = ?\\\\Rozwiazanie\\\\\lambda = c\cdot T\\\\ale \ \ T = \frac{1}{f}, \ zatem\\\\\lambda = \frac{c}{f}\\\\\lambda = \frac{3\cdot10^{8}\frac{m}{s}}{0,412\cdot10^{8} \ Hz}=\frac{3\cdot10^{8}\frac{m}{s}}{0,412\cdot10^{8} \ s^{-1}}\\\\\boxed{\lambda\approx7,28 \ m}[/tex]
