Answer
Unit of a Wavelength (λ) is meter
Unit of a Frequency (f) is Hz
Speed of Light is $\frac{meter}{second}$ is $3\times 10^{+8}$ $ \frac{m}{s}$.
$\therefore$ Speed of Light is $\frac{miles}{hour}$ is $6.7\times 10^{+8}$ miles/hr.
Work Step by Step
Unit of a Wavelength ($\lambda)$ is $\textbf meter$
Unit of a Frequency ($f)$ is $\textbf Hz $
Speed of Light is $\frac{meter}{second}$ is $3\times 10^{+8}$ $ \frac{m}{s}$.
1 mile = 1.61 kilometer
1 km = 1000 meter
$\therefore$ 1 mile = 1610 meter and 1 meter will be $\frac{1}{1610}$
1hr = 3600 sec
Speed of Light is $\frac{miles}{hour}$ is $3\times 10^{+8}\times \frac{1}{1610}\times 3600 $ $ \frac{miles}{sec}$.
$\therefore$ Speed of Light is $\frac{miles}{hour}$ is $6.7\times 10^{+8}$ miles/hr.
