Question

The frequency of radiation having wavelength $5800\overset{^\circ }{A}$ is $y\times 10^{14}$ . The value of $y$ is

Roundoff the answer up to one significant figures.

Answer 1

Given wavelength, $\lambda =5800\overset{^\circ }{A}$
Frequency $\nu=\frac{c}{\lambda }$
$\nu=\frac{c}{\lambda }=\frac{3 X 10^{8}}{5800 X 10^{- 10}}HZ\nu=5.172\times 10^{14}Hz.$