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How energy of the emitted electron is proportional to the incident light frequency but not to its amplitude according to photoelectric effect?
The photoelectric effect is the phenomenon in which electrons are ejected from a material when it is exposed to light. This effect occurs when the energy of the light is greater than the binding energy of the electrons in the material.
The frequency of the light directly affects the kinetic energy of the ejected electrons. Higher frequency light has more energy, so it can eject electrons with greater kinetic energy. This relationship is described by the equation E=hf, where E is the energy of the ejected electron, h is Planck's constant, and f is the frequency of the light.
The amplitude of the light does not directly affect the photoelectric effect. Amplitude refers to the intensity or brightness of the light, which can influence the number of electrons ejected, but not their kinetic energy. The energy of the ejected electrons is determined by the frequency of the light.
The threshold frequency is the minimum frequency of light required to eject electrons from a material. Below this frequency, no electrons will be ejected regardless of the intensity of the light. The threshold frequency is unique to each material and is determined by the binding energy of its electrons.
The photoelectric effect provides evidence for the particle nature of light. This is because the energy of the ejected electrons is directly proportional to the frequency of the light, which is a characteristic of particles. Furthermore, the photoelectric effect cannot be explained by wave theory, as waves do not have the ability to eject electrons from a material.