In the photoelectric effect, what happens to the kinetic energy of emitted elect

Practice Questions

Q1
In the photoelectric effect, what happens to the kinetic energy of emitted electrons as the frequency of incident light increases? (2021)
  1. Increases
  2. Decreases
  3. Remains constant
  4. Becomes zero

Questions & Step-by-Step Solutions

In the photoelectric effect, what happens to the kinetic energy of emitted electrons as the frequency of incident light increases? (2021)
  • Step 1: Understand the photoelectric effect. This is when light hits a material and causes it to emit electrons.
  • Step 2: Know that light has a frequency, which is how fast the light waves oscillate.
  • Step 3: Learn about the threshold frequency. This is the minimum frequency of light needed to emit electrons from the material.
  • Step 4: If the frequency of the incident light is below the threshold frequency, no electrons are emitted.
  • Step 5: If the frequency of the incident light is above the threshold frequency, electrons are emitted.
  • Step 6: As the frequency of the incident light increases (above the threshold), the kinetic energy of the emitted electrons also increases.
  • Step 7: This means that higher frequency light gives the emitted electrons more energy, making them move faster.
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