Calculating Frequency and Wavelength of Light on Metal Surface

[tiffgraf]

Homework Statement

When light is frequency 2,00 x 10(in 16force) Hz prostrate a metal surface electrons are abstracted with kinetic energy 7,50 x 10(in -18force) J.

Calculate:
(a) The frequency v0 for the metal (v0: the minimum frequency of light, below which no electrons emitted).
(b) The wavelength of the emitted electrons.

Homework Equations

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The Attempt at a Solution

i really want some instructions or solution to understand better the subject

 

[Borek]

Energy of photon = Energy needed to remove an electron + Kinetic energy of the emitted electron