Answer
(a) $\lambda = 3.2\times 10^{-3}~m$
(b) $f = 9.4\times 10^{10}~Hz$
Work Step by Step
(a) We can find the wavelength as:
$\lambda = \frac{v}{f}$
$\lambda = \frac{6320~m/s}{2.0\times 10^6~Hz}$
$\lambda = 3.2\times 10^{-3}~m$
(b) We can find the frequency of an electromagnetic wave with this wavelength as:
$f = \frac{v}{\lambda}$
$f = \frac{3.0\times 10^8~m/s}{3.2\times 10^{-3}~m}$
$f = 9.4\times 10^{10}~Hz$
