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(C) According to the photoelectric effect,the kinetic energy $(KE)$ of the emitted photoelectrons is given by the equation: $KE = h
u - \Phi$,where $

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have energies that depend upon the frequency of light

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(C) According to the photoelectric effect,the kinetic energy $(KE)$ of the emitted photoelectrons is given by the equation: $KE = h
u - \Phi$,where $h$ is Planck's constant,$
u$ is the frequency of the incident light,and $\Phi$ is the work function of the metal. Since $\Phi$ is constant for a given metal,the kinetic energy of the emitted electrons depends directly on the frequency of the incident light $(
u)$.

When light is directed at the metal surface,the emitted electrons

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