The minimum frequency of incident light required to eject an electron from a metal surface is called the:

In the photoelectric effect the number of emitted photoelectrons depends on the:

According to Einstein's photoelectric equation, the maximum kinetic energy of an emitted photoelectron depends exclusively on the metal's work function and the:

The radioactive half-life ($T_{1/2}$) of a deteriorating isotope is mathematically related to its specific decay constant ($\lambda$) by the standard approximation:

According to Bohr's model the angular momentum of an electron in an orbit is an integral multiple of:

Alpha particles emitted during radioactive decay are physically identical to:

In the photoelectric effect, what term defines the absolute minimum photon energy required to physically eject a surface electron from a specific metal lattice?