In an ultraviolet flame detector, a photoelectric cell utilizes a cesium-coated cathode with a work function of 2.14 eV2.14\text{ eV}2.14 eV. When ultraviolet radiation of wavelength 280 nm280\text{ nm}280 nm is incident on the cathode, photoelectrons are emitted.
What is the maximum kinetic energy of these emitted photoelectrons?
3.68 eV3.68\text{ eV}3.68 eV
2.30 eV2.30\text{ eV}2.30 eV
4.44 eV4.44\text{ eV}4.44 eV
6.58 eV6.58\text{ eV}6.58 eV
