Answer
(a) $4.74\times10^{14}\,Hz$
(b) $5.96\times10^{14}\,Hz$
(c) $5.8\times10^{18}\,Hz$
Work Step by Step
Using the relation $\nu=\frac{c}{\lambda}$ where $c$ is the speed of light, we have
(a) Frequency $\nu=\frac{3.00\times10^{8}m/s}{632.8\,nm}$
$=\frac{3.00\times10^{8}\,m/s}{632.8\times10^{-9}\,m}$
$=4.74\times10^{14}\,Hz$
(b) $\nu=\frac{3.00\times10^{8}\,m/s}{503\times10^{-9}\,m}$
$=5.96\times10^{14}\,Hz$
(c) $\nu=\frac{3.00\times10^{8}\,m/s}{0.052 \times10^{-9}\,m}$
$=5.8\times10^{18}\,Hz$
