Physics MCQ

When electromagnetic radiation of sufficiently high frequency strikes a metal surface, electrons are emitted from the surface. This phenomenon is called the photoelectric effect.

Key equation: Maximum kinetic energy of photoelectron

$K_{\text{max}} = h\nu - \phi$

where $h$ is Planck's constant $(6.63 \times 10^{-34} \text{J}\cdot\text{s}$, $\nu$ is the frequency of incident light, and $\phi$ is the work function of the metal.