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What happens to the speed of light as it passes from air into water? (2022)

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Question: What happens to the speed of light as it passes from air into water? (2022)

Options:

  1. Increases
  2. Decreases
  3. Remains the same
  4. Becomes zero

Correct Answer: Decreases

Exam Year: 2022

Solution: 

The speed of light decreases when it passes from a less dense medium (air) to a denser medium (water).

What happens to the speed of light as it passes from air into water? (2022)

Practice Questions

Q1
What happens to the speed of light as it passes from air into water? (2022)
  1. Increases
  2. Decreases
  3. Remains the same
  4. Becomes zero

Questions & Step-by-Step Solutions

What happens to the speed of light as it passes from air into water? (2022)
  • Step 1: Understand that light travels at a certain speed in air, which is faster than in water.
  • Step 2: Recognize that air is less dense than water.
  • Step 3: When light moves from air (less dense) into water (denser), it slows down.
  • Step 4: Conclude that the speed of light decreases when it enters water from air.
  • Refraction of Light – The phenomenon where light changes speed and direction when transitioning between different media.
  • Density and Light Speed – Understanding how the density of a medium affects the speed of light traveling through it.
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