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

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Question: What happens to the number of emitted electrons if the intensity of light is increased while keeping the frequency above the threshold?

Options:

  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

Correct Answer: The number of emitted electrons increases

Solution: 

Increasing the intensity of light increases the number of photons incident on the surface, leading to more emitted electrons, provided the frequency is above the threshold.

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.
  • Photoelectric Effect – The phenomenon where electrons are emitted from a material when it is exposed to light of sufficient frequency.
  • Intensity and Photon Count – Intensity of light is directly related to the number of photons; increasing intensity increases the number of photons hitting the surface.
  • Threshold Frequency – The minimum frequency of light required to emit electrons; if the frequency is above this threshold, electrons can be emitted.
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