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If the light source's energy does not pass the energy threshold the electrons won't be ejected since E(Photon) is less than the threshold energy. If the E(Photon) and the threshold energy are equal then the electron will be released but will have no kinetic energy.
The electron only jumps orbitals if the energy of the photon reaches the energy threshold(exactly how much energy is required to excite the electron), or is greater than the energy threshold. Increasing the intensity or wavelength of light will not result in the electron being excited because these elements alter the number of a photon hitting the electron, but not the energy of the photon itself. In order to excite the electron, the frequency in which the wave hits the electron would have to be increased. That being said, if the energy threshold is not reached the energy will not just disappear(first law of thermodynamic energy is always conserved), it may be absorbed by the electron or refracted.
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