oo The threshold frequency $v_0$ describes the smallest light frequency capable of ejecting electrons from a metal.

Determine the minimum energy $E_0$ of a photon capable of ejecting electrons from a metal with $v_0=5\mathrm{.}57{10}^{14}{s}^{-1}.$

What is the maximum kinetic energy $K{E}_{\text{e}\text{l}\text{e}\text{c}\text{t}\text{r}\text{o}\text{n}}$ of electrons ejected from this metal by light with a wavelength of $265nm?$

$K{E}_{\text{e}\text{l}\text{e}\text{c}\text{t}\text{r}\text{o}\text{n}}=$