Appeared in: 2026 (2 sets)
Radiation of wavelength $200\text{ nm}$ is incident on a photosensitive surface of work function $4\cdot2\text{ eV}$. The kinetic energy of fastest photoelectrons emitted from this surface will be close to :
(A) $3\cdot5\text{ eV}$
(B) $3\cdot0\text{ eV}$
(C) $2\cdot5\text{ eV}$
(D) $2\cdot0\text{ eV}$