Einstein photo-electric equation states that $E_k = hv - Ø$. In the equation, $E_k$ refers to
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Maximum kinetic energy of the emitted electrons
$K.E._{max}=hv-\phi$
This is the photoelectric equation.
$K.E._{max}$ = Maximum kinetic energy of photoelectron
$hv$ = Energy of photon
$\phi$ = Work function