formula of work function
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h = the Plank constant 6.63 x 10-34 J s
f = the frequency of the incident light in hertz (Hz)
phi = the work function in joules (J)
E(k) = the maximum kinetic energy of the emitted electrons in joules (J)
h×f = phi + E(k)
f = the frequency of the incident light in hertz (Hz)
phi = the work function in joules (J)
E(k) = the maximum kinetic energy of the emitted electrons in joules (J)
h×f = phi + E(k)
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