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Cambridge IGCSE Physics practice

Paper 6 structured question: Refraction of light

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Refraction of light

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Paper 6Alternative to PracticalPractical2 marks

Data collection from a refraction experiment.

Results Table

Refraction Results

The table shows the angles of incidence and refraction for various shapes of blocks.

Shape of BlockAngle of Incidence (degrees)Angle of Refraction (degrees)
Rectangular Prism3020
Triangular Prism4530
Circular Block6040
  1. a

    Describe the trend observed in the angles of refraction as the shape of the block changes.

    Aim for approximately 2 distinct marking points.

    [2]

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Paper 6 structured question: Refraction of light

Paper 6Alternative to PracticalPractical1 marks

Method

Refraction Experiment Method

1. Set up a light source to shine a beam of light towards the transparent block. 2. Measure the angle of incidence as the light hits the block. 3. Observe and measure the angle of refraction as the light exits the block. 4. Repeat for different shapes of blocks.

  1. a

    State the independent variable in this experiment.

    Aim for approximately 1 distinct marking point.

    [1]