Why Does Light Bends When It Passes Through Water?

Imagine you're in a pool, and you see your friend on the other side of the water. They look a little closer than they actually are, that’s because light bends when it moves from one material to another, like air to water. This bending is called light refraction. Think of it like a ball rolling from a smooth floor into a grassy field, it changes direction slightly because the surface under it changed.

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Examples

  1. A straw appears bent when it's placed in water because light bends as it moves from air into water.
  2. When you look at a fish underwater, it seems closer to the surface than it actually is due to refraction.
  3. The bottom of a swimming pool looks shallower than it really is because of how light bends in water.

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Categories: Physics · refraction· light· optics· water· physics