1. Reflection
  2. Refraction
  3. Retention
  4. Focus
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1 Answers

Option 2 : Refraction

CONCEPT:

Refraction: When a ray of light passes from one medium to another it suffers a change in direction at the boundary of two media is called refraction.

  • The change in direction because the speed of light travels at different speeds in different mediums.
  • Refractive Index of a medium defines that it is denser or rarer
  • Refractive Index = Speed of light in Vacuum /speed of light in that medium.
  • Refractive Index = η = c/v where, c = Speed of light in Vacuum, v = speed of light in that medium.


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EXPLANATION:

A coin in a beaker filled with water appears raised because of Refraction.

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