Radiation of wavelength \(\lambda\) is incident on a photosensitive surface. Find the de Broglie wavelength of electrons emitted from the surface. Assume that the work function of the surface is negligible.
Show Hint
For photoelectric problems with negligible work function,
\[
K=\frac{hc}{\lambda}.
\]
Then use
\[
\lambda_d=\frac{h}{\sqrt{2mK}}
\]
to obtain the de Broglie wavelength of the emitted electron.