Answer
(a) $\lambda = 0.277~m$
(b) $\lambda = 0.504~m$
(c) $\lambda = 0.277~m$
Work Step by Step
(a) We can find the wavelength:
$\lambda = \frac{v}{f}$
$\lambda = \frac{341~m/s}{1231~Hz}$
$\lambda = 0.277~m$
(b) When a wave travels from one medium into another medium, the frequency does not change.
We can find the wavelength:
$\lambda = \frac{v}{f}$
$\lambda = \frac{620~m/s}{1231~Hz}$
$\lambda = 0.504~m$
(c) We can find the wavelength:
$\lambda = \frac{v}{f}$
$\lambda = \frac{341~m/s}{1231~Hz}$
$\lambda = 0.277~m$
