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In the photoelectric effect, what does the term 'work function' refer to?

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Question: In the photoelectric effect, what does the term \'work function\' refer to?

Options:

  1. The energy of the incident photons
  2. The energy required to remove an electron from the metal
  3. The maximum kinetic energy of emitted electrons
  4. The frequency of the incident light

Correct Answer: The energy required to remove an electron from the metal

Solution: 

The work function is the minimum energy required to remove an electron from the surface of a metal.

In the photoelectric effect, what does the term 'work function' refer to?

Practice Questions

Q1
In the photoelectric effect, what does the term 'work function' refer to?
  1. The energy of the incident photons
  2. The energy required to remove an electron from the metal
  3. The maximum kinetic energy of emitted electrons
  4. The frequency of the incident light

Questions & Step-by-Step Solutions

In the photoelectric effect, what does the term 'work function' refer to?
  • Step 1: Understand that the photoelectric effect involves light hitting a metal surface.
  • Step 2: Know that when light hits the metal, it can cause electrons to be released.
  • Step 3: Realize that not just any amount of energy will release an electron; there is a minimum amount needed.
  • Step 4: This minimum energy needed to remove an electron is called the 'work function'.
  • Step 5: The work function varies for different metals.
  • Work Function – The minimum energy needed to remove an electron from the surface of a metal.
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