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## Homework Statement

A certain photoelectric surface has a threshold frequency of 4.62 X 10^14 Hz.

a) What is the photoelectric work function in joules?

b) The surface is illuminated with light that has a frequency of 5.2 X 10^14 Hz. What is the kinetic energy of the electrons ejected from the surface? Answer in joules and electron volts.

## Homework Equations

1 eV = 1.6 X 10^19 J

W = hf

## The Attempt at a Solution

a) 3.06 X 10^-19 J

b) I need help on! I have no idea which equation to use, etc. Thanks!