Physics - Modern Physics Question with Solution | TestHub

$\text{Power}=\frac{\text{E}}{\text{t}} E=\text{Energy }$
$\therefore \text{E}=\text{Power}\times \text{time}=\frac{\text{hc}}{\lambda }$
$\frac{\text{hc}}{\lambda }=30\times 10^{-3}\times 100\times 10^{-9}$
$\therefore \text{p}=\frac{\text{h}}{\lambda }=\frac{3\times 10^{-9}}{3\times 10^8}=1\times 10^{-17}\mathrm{ kg\; ms}$