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## Homework Statement

Red light of wavelength 670 nm produces photoelectrons from a certain material. Green light of wavelength 522 nm produces photoelectrons from the same material with 1.2 times the previous maximum kinetic energy. What is the material's work function? answer in units of eV

## Homework Equations

hf = KE

_{max}+ W

_{o}

## The Attempt at a Solution

(6.63e^-34)(3e^8) / 522e-9 = 1.2 + W

the answer i get after punching this into the calculator is 1.2 since the left side of the equation virtually equals zero. Please help me solve this. Thanks!