In the photoelectric effect, what happens when the frequency of incident light i

Practice Questions

Q1
In the photoelectric effect, what happens when the frequency of incident light is increased? (2020)
  1. More electrons are emitted
  2. Electrons are emitted with higher energy
  3. No electrons are emitted
  4. The current decreases

Questions & Step-by-Step Solutions

In the photoelectric effect, what happens when the frequency of incident light is increased? (2020)
  • Step 1: Understand that the photoelectric effect involves light hitting a material and causing electrons to be emitted.
  • Step 2: Know that light can be thought of as made up of particles called photons.
  • Step 3: Recognize that each photon has energy, which is determined by its frequency (how fast the light waves oscillate).
  • Step 4: Learn the formula E = hf, where E is energy, h is Planck's constant, and f is the frequency of the light.
  • Step 5: Realize that if you increase the frequency (f) of the incident light, the energy (E) of each photon also increases.
  • Step 6: Understand that higher energy photons can cause electrons to be emitted with more energy, meaning they will move faster.
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