Find the cutoff wave length of potassium

Reference no: EM13494455

Work function of potassium is 2.25 eV.

a) Find the cutoff wave length of potassium

b) If the maximum energy of the photoelectron due to some X-ray, from the surface of potassium is 1.2 eV, find the frequency of the X-ray.

Reference no: EM13494455

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