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Yes, the ionization energy is the energy it takes to remove an electron, making it the threshold energy. So the energy of the light has to be equal to or greater than the threshold energy to successfully surpass the threshold energy, and remove the electron.
Adding on, if the energy of the photon is more, that means the electron is ejected has more energy in the form of kinetic energy. This kinetic energy of the displaced electron can be calculated by E(photon) - E(threshold of electron) = kinetic energy.
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