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Define the refractive index (n) as the ratio of wave speeds in two different media.

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Define the refractive index (n) as the ratio of wave speeds in two different media

  • This point belongs to Refraction of light, especially Refraction of light outcomes.
  • You need to be able to define the refractive index (n) as the ratio of wave speeds in two different media.
  • The key ideas to know are Define and Know.
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Paper 4 structured question: Refraction of light

Paper 4Theory (Extended)1 marks

Description

Refractive Index

The speed of light in a vacuum is approximately 3.0 x 10^8 m/s. In water, the speed of light is about 2.3 x 10^8 m/s. Calculate the refractive index of water.

  1. a

    State the formula for calculating the refractive index.

    Aim for approximately 1 distinct marking point.

    [1]
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