lat is the unit of work function?

Electron volts

$\backslash$table$[[$Electron volts$],[$Watts$],[$Hertz$],[$Joules$]]$

What is the maximum kinetic energy of an electron ejected from a metal surface if the frequency of the incident light is $5{10}^{14}Hz$ and the work function is $2{10}^{-19}J?$

$5{10}^{-19}J$

$1\mathrm{.}5{10}^{-19}J$

$2\mathrm{.}5{10}^{-19}J$

$310^-19$J

What is the maximum kinetic energy of an electron jected from a metal surface if the frequency of the ncident light is doubled?

What is the name of the process by which electrons are emitted from a metal surface when light of a certain frequency shines on it$?$

Quantum tunneling

Electron diffraction

Compton effect

Photoelectric effect