Question

QUESTION FOR CHEMISTRY LOVERS !!
Radiation of energy 8 eV is incident on a metal surface. If its work function is 3.5 eV, calculate the stopping potential .

Answer 1

$kinetic \: energy \: = hv - \alpha$

eV = hv —work function

$1.6 { \times 10}^{ - 19} v = (8 \times 1.6 { \times 10}^{ - 19} ) - (3.5 \times {10}^{ - 19} ) \\ 1.6 { \times 10}^{ - 19} v = 9.3 \times {10}^{ - 19} \\ v = 5.8125 \: volts$