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What happens to the speed of light when it passes from air into water?

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Question: What happens to the speed of light when it passes from air into water?

Options:

  1. It increases
  2. It decreases
  3. It remains the same
  4. It becomes zero

Correct Answer: It decreases

Solution: 

The speed of light decreases when it passes from air into water due to the higher refractive index of water.

What happens to the speed of light when it passes from air into water?

Practice Questions

Q1
What happens to the speed of light when it passes from air into water?
  1. It increases
  2. It decreases
  3. It remains the same
  4. It becomes zero

Questions & Step-by-Step Solutions

What happens to the speed of light when it passes from air into water?
  • Refraction – The bending of light as it passes from one medium to another, which affects its speed.
  • Refractive Index – A measure of how much the speed of light is reduced in a medium compared to a vacuum.
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