The maximum wavelength that an electromagnetic wave can have and still eject electrons from a metal surface is 542 nm. what is the work function w0 of this metal? express your answer in electron volts.

2.295 eV

Explanation:

maximum wavelength, λ = 542 nm = 542 x 10^-9 m

The work function of the metal is defined as the minimum amount of energy falling on the metal so that the photo electrons just ejects the surface of metal.

where, h is the Plank's constant and c be the speed of light

h = 6.634 x 10^-34 Js

c = 3 x 10^8 m/s

Wo = 2.295 eV

Thus, the work function of this metal is 2.295 eV.

answer would be d.) i hope this

explanation: