College Physics 10th Edition by Raymond Serway,Chris Vuille

تمرين 10

Lithium, beryllium, and mercury have work functions of 2.30 eV, 3.90 eV, and 4.50 eV, respectively. Light with a wavelength of 4.00 × 10 2 nm is incident on each of these metals. (a) Which of these metals emit photoelectrons in response to the light Why (b) Find the maximum kinetic energy for the photoelectrons in each case.