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Threshold energy is the minimum amount of energy needed for the photon to remove an electron from the metal surface. It takes energy for the photon to remove the electron, and any less energy than needed (the threshold) would not eject an electron.
The threshold energy is a minimum amount of energy that a photon (think a packet of energy) has to reach to eject an electron from an atom of a certain metal. Threshold energy is determined by the type of metal, and different metals have different threshold energies for its atoms/electrons.
Threshold energy is the minimum energy needed to eject an electron from a metal surface. The energy of the photon minus the threshold energy should equal to kinetic energy of the electron. This should satisfy the Law of conservation of energy.
Threshold energy is the amount of energy required to remove a single electron from a metal surface. Different metals have different threshold energies due to the difference in electronegativity. Each photon must have enough energy to remove an electron regardless of the amount of photons present in light. Intensity increases the number of photons, while frequency increases the energy of photons. Therefore, frequency has a direct effect on the removal of electrons from a metal surface.
Threshold energy is the amount of energy that is required to remove an electron from a metallic surface. The two main forces that determine how electrons will react to the photons of light are intensity and frequency.
Threshold energy is the energy required in an experiment to remove an electron from a metal surface. Different metals will require different threshold energies. This energy will either be provided in the problem or be something that you must solve for.
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