What happens to the number of emitted electrons if the intensity of light is inc

Practice Questions

Q1
What happens to the number of emitted electrons if the intensity of light is increased while keeping the frequency above the threshold?
  1. The number of emitted electrons decreases
  2. The number of emitted electrons increases
  3. The energy of each emitted electron increases
  4. No electrons are emitted

Questions & Step-by-Step Solutions

What happens to the number of emitted electrons if the intensity of light is increased while keeping the frequency above the threshold?
Correct Answer: Number of emitted electrons increases.
  • Step 1: Understand that light is made up of tiny particles called photons.
  • Step 2: Know that each photon can knock an electron out of a material if the light's frequency is high enough (above the threshold).
  • Step 3: Realize that increasing the intensity of light means more photons are hitting the surface of the material.
  • Step 4: Since there are more photons, there are more chances for electrons to be knocked out.
  • Step 5: Conclude that if the frequency is above the threshold, increasing the intensity will result in more emitted electrons.
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