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5.1 Reflection, refraction and lenses

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Question 30

A ray of light enters a laminated safety screen at an angle to the normal. The screen has two transparent layers with parallel boundaries.

MediumSpeed of light in medium in m/s\mathrm{m/s}m/s
air3.00 × 108
outer layer2.10 × 108
inner layer1.90 × 108

Explain how the data predict the change in direction of the ray at each boundary, and compare the angle of the ray to the normal in the inner layer with its original angle in air.

[4]
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5.1 Reflection, refraction and lenses Questions

  1. GCSE
  2. /Physics
  3. /5.1 Reflection, refraction and lenses

93 exam-style questions on Edexcel GCSE Physics 5.1 Reflection, refraction and lenses, covering 5.1.1 Reflection, refraction and total internal reflection, 5.1.2 Specular and diffuse reflection, 5.1.3 Colour of light: absorption and filters, 5.1.4 Lenses: power, focal length and shape, 5.1.5 Ray diagrams for converging and diverging lenses, and 5.1.6 Real and virtual images. Each one has a worked solution and a mark scheme showing where the marks go.

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