Question

The work function of metal is 1.86 ev calculate
the wavelength of the light that should
be used to
eject an electron fron the metal​

Answer 1

Explanation:

In this way we can solve the problem my friend....for you

Answer 2

1.86=1240/(wavelength in nm)

wavelength =666.67nanometre

so the wavelength to be used should be less

than 666.67nm to eject electron