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What is the photoelectric effect?

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Question: What is the photoelectric effect?

Options:

  1. Emission of electrons from a metal surface when light shines on it
  2. Absorption of light by a metal surface
  3. Reflection of light from a metal surface
  4. Transmission of light through a metal surface

Correct Answer: Emission of electrons from a metal surface when light shines on it

Solution: 

The photoelectric effect is the phenomenon where electrons are emitted from a metal surface when it is exposed to light of sufficient frequency.

What is the photoelectric effect?

Practice Questions

Q1
What is the photoelectric effect?
  1. Emission of electrons from a metal surface when light shines on it
  2. Absorption of light by a metal surface
  3. Reflection of light from a metal surface
  4. Transmission of light through a metal surface

Questions & Step-by-Step Solutions

What is the photoelectric effect?
Correct Answer: Photoelectric effect
  • Step 1: Understand that light is made of tiny particles called photons.
  • Step 2: Know that metals have electrons that can move around.
  • Step 3: When light hits the metal, if the light has enough energy (frequency), it can knock out electrons from the metal.
  • Step 4: This process of electrons being knocked out is called the photoelectric effect.
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