Question

$need \: \: steps$
the work function of a metal is 2.07ev.
the maximum wave length of light can show photoelectric effect
answer is 6×10^-7​

Answer 1

The formula to be used will be

E=12400/ λ

Note: λ has to be in A° and the energy will be in eV.

λ = 12400/E

=12400/ 2.07

=5990.3 A°

=5.9 ×10^-7 m

Answer 2

The formula to be used will be

E=12400/ λ

Note: λ has to be in A° and the energy will be in eV.

λ = 12400/E

=12400/ 2.07

=5990.3 A°

=5.9 ×10^-7 m