Explore BrainMass

Photoelectric effect and work function of metal

Please explain and solve

The work function W of a metal specifies the minimum energy required to remove an electron from that metal, and is expressed as an energy per mole of electrons. For Calcium Ca, W=262 kJ mol^-1.

(a) A sample of Ca is irradiated with green light. Are electrons ejected? Justify.
(b) A sample of Ca is irradiated with light of wavelength 4.10 x 10^-7 m, and electrons are ejected. What is the speed, in m/s, of these electrons?

© BrainMass Inc. brainmass.com July 23, 2018, 11:42 am ad1c9bdddf

Solution Preview

Please see the attached file for detailed solution.
a) first find the energy ...

Solution Summary

The solution is comprised of detailed explanations of photoelectric effect of calcium. It shows the step-by-step calculation of the speed of the ejected electrons when the incident photon energy is larger than its work function.