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In the photoelectric effect, the kinetic energy of the emitted electrons depends

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Question: In the photoelectric effect, the kinetic energy of the emitted electrons depends on which of the following?

Options:

  1. Frequency of the incident light
  2. Intensity of the incident light
  3. Wavelength of the incident light
  4. All of the above

Correct Answer: Frequency of the incident light

Solution: 

The kinetic energy of the emitted electrons in the photoelectric effect depends on the frequency of the incident light, as per Einstein\'s photoelectric equation.

In the photoelectric effect, the kinetic energy of the emitted electrons depends

Practice Questions

Q1
In the photoelectric effect, the kinetic energy of the emitted electrons depends on which of the following?
  1. Frequency of the incident light
  2. Intensity of the incident light
  3. Wavelength of the incident light
  4. All of the above

Questions & Step-by-Step Solutions

In the photoelectric effect, the kinetic energy of the emitted electrons depends on which of the following?
Correct Answer: Frequency of the incident light
  • Step 1: Understand the photoelectric effect. This is when light hits a material and causes it to emit electrons.
  • Step 2: Know that light can be thought of as made up of tiny packets of energy called photons.
  • Step 3: Realize that each photon has a specific frequency (or color) and energy associated with it.
  • Step 4: Learn that the energy of a photon is directly related to its frequency. Higher frequency means more energy.
  • Step 5: Understand that when a photon hits an electron, it can transfer its energy to the electron.
  • Step 6: If the energy from the photon is greater than a certain threshold (the work function of the material), the electron is emitted.
  • Step 7: The kinetic energy of the emitted electron is equal to the energy of the photon minus the work function of the material.
  • Step 8: Therefore, the kinetic energy of the emitted electrons depends on the frequency of the incident light.
  • Photoelectric Effect – The phenomenon where electrons are emitted from a material when it is exposed to light of sufficient frequency.
  • Einstein's Photoelectric Equation – The equation that relates the kinetic energy of emitted electrons to the frequency of the incident light, given by KE = hf - φ, where KE is kinetic energy, h is Planck's constant, f is frequency, and φ is the work function.
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