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## Homework Statement

For an incoming light shining on a metal surface, I am given the wavelength, the cutoff voltage, the frequency (by using f = c/w). From here, Im having trouble finding the maximun Ek of the ejected electrons in electron volts (eV) and joules (J).

## Homework Equations

Ek max = eV

E = hƒ = hc / λ

Ek max = E (photon) - work

## The Attempt at a Solution

Im guessing that i can use the equation Ek max = eV by substituting in the cutoff voltage and the charge on an electron to get the Ek max in joules, but then how do I get it in electron volts? Is there a conversion factor, or another equation I use??

PLz help..