# The work function of caesium metal is $2.14$ ev when light of frequency $6 \times 10^4 \;Hz$ is incident on the metal surface , photo emission of electron occur. what is the a) maximum kinetic energy of emitted electrons
$\begin{array}{1 1} 0.35\;ev \\ 0.035\;ev \\ 3.5 \;ev \\ 3 ev \end{array}$