Question

Needed the solutions.... plzz

Answer 1

This question is based on Einstein photoelectric theory .
K.Emax = hc/lemda - work function

= 6.626 × 10^-34× 3×10^8/360× 10^-10 - 7.52 × 10^-19

=( 6.626×3/360)× 10^-16 - 7.52 × 10^-19

=0.0552 × 10^-16 - 7.52 × 10^-19

= ( 55.2 -7.52) × 10^- 19 j

= 47.68 × 10^-19 j