An ultraviolet sensor aboard an atmospheric research probe consists of a silver-coated plate in a vacuum. Monochromatic ultraviolet radiation with a wavelength of 195 nm195\text{ nm}195 nm is incident on the plate. The work function of the silver surface is 4.70 eV4.70\text{ eV}4.70 eV.
What is the maximum kinetic energy of the emitted photoelectrons?
1.68 eV1.68\text{ eV}1.68 eV
2.68 eV2.68\text{ eV}2.68 eV
6.38 eV6.38\text{ eV}6.38 eV
11.08 eV11.08\text{ eV}11.08 eV
