Electromagnetic radiation of 5.44×10-11 m wavelength is shined on a metal surface and caused electron emission....
Electromagnetic radiation of 5.44×10-11 m wavelength is shined on a metal surface and caused electron emission. Determine the work function of the metal if the maximum kinetic energy (Ek) of the emitted electron is 6.55×10-16 J.
Homework Answers
Given:
lambda = 5.44*10^-11 m
use:
E = h*c/lambda
=(6.626*10^-34 J.s)*(3.0*10^8 m/s)/(5.44*10^-11 m)
= 3.654*10^-15 J
Given:
KE = 6.55*10^-16 J
Use:
KE = E - Eo
6.55*10^-16 J = 3.654*10^-15 J - Eo
Eo = 3.00*10^-15 J
Answer: 3.00*10^-15 J
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