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Learning objective

Explain and apply the concepts of normal line, angle of incidence, and angle of refraction.

Read the explanation, check the common trap, then practise with flashcards and questions.

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  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE PhysicsSubject contentCore content

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Quick explanation

Explain and apply the concepts of normal line, angle of incidence, and angle of refraction

  • This point belongs to Refraction of light, especially Refraction of light outcomes.
  • You need to be able to explain and apply the concepts of normal line, angle of incidence, and angle of refraction.
  • The key ideas to know are Define and Use.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

DefineUse

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This objective helps connect Refraction of light outcomes to exam-style questions, flashcards, and revision notes for Refraction of light.

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Paper 3 structured question: Refraction of light

Paper 3Theory (Core)1 marks

Description

Refraction of Light

A ray of light strikes the surface of water at an angle of incidence of 45°. The refractive index of water is 1.33.

  1. a

    State the angle of refraction when the light enters the water.

    Aim for approximately 1 distinct marking point.

    [1]
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