Question

Light from Balmer series of hydrogen is able to eject photoelectrons from a metal. What can be maximum work function of the metal ?

Answer 1

The maximum energy liberated by the Balmer Seriesa is

$n_1=2,n_1=\infty$

E = $13.6(\frac{1}{n_1^2}-\frac{1}{n_2^2})$

= $13.6\times \frac{1}{4}=3.4eV$

3.4 e V is the maximum work function of the metal