Physics - Help!

An incident light is monochromatic and of wavelenght 600nm, the kinetic energy of the electron is 2.56 x 10^(-20)J. For light of wavelenght 400nm, it is 1.92 x 10^(-19)J.
Use the above information to estimate the value of Planck's constant,h and the work function,W of the metal.
(Take the velocity of light to be 3 x 10^98)m/s)

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asked by Sola

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