## Essential University Physics: Volume 1 (4th Edition)

We use the equation for wavelength to find: a) $\lambda= \frac{1500m/s}{8\times10^6Hz}=1.9\times10^{-4}m$ b) $\lambda= \frac{1500m/s}{3.5\times10^6Hz}=4.3\times10^{-4}m$