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Cambridge IGCSE Physics practice

Paper 4 structured question: Refraction of light

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Refraction of light

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Paper 4Theory (Extended)1 marks

Understanding the behavior of light in different media is essential in optics.

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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Paper 4 structured question: Refraction of light

Paper 4Theory (Extended)3 marks

Description

Refractive Index Calculation

Given that the speed of light in glass is 2.0 x 10^8 m/s, calculate the refractive index of glass.

  1. a

    Define the refractive index.

    Aim for approximately 2 distinct marking points.

    [2]
  2. b

    State the refractive index of glass based on the calculation.

    Aim for approximately 1 distinct marking point.

    [1]