Physics · Dawn of Modern Physics

Energy will be emitted when electrons jump from higher energy levels to lower energy levels.

a) Low energies: This option refers to photons with low energy levels. In the photoelectric effect, electrons can be ejected from a material when it is exposed to photons of sufficient energy. If the photons have low energy, they might not have enough energy to overcome the binding energy of electrons in the material. Therefore, removal of photons may not be observed at low energies. 

b) High energies: This option refers to photons with high energy levels. When high-energy photons strike a material in the photoelectric effect, they can transfer enough energy to electrons to overcome the binding energy and eject them from the material. Removal of photons is observed at high energies because these photons have the necessary energy to cause the photoelectric effect. 

c) Intermediate energies: This option suggests an intermediate range of photon energies. The effectiveness of the photoelectric effect depends on whether the energy of the photons matches or exceeds the binding energy of the electrons. Intermediate energies may or may not lead to the removal of photons depending on the specific material and its electron configuration. 

d) Both A and C: This option combines low energies (Option A) and intermediate energies (Option C). While Option A suggests that removal of photons is not observed at low energies, Option C proposes that removal of photons is observed at intermediate energies. Combining these two options doesn't provide a consistent explanation.