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Learning objective

Outline experiments aimed at distinguishing between effective and ineffective absorbers of infrared radiation.

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Cambridge IGCSE PhysicsThermal physicsSupplement contentPractical objective

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Outline experiments aimed at distinguishing between effective and ineffective absorbers of infrared radiation

  • This point belongs to Radiation, especially Radiation outcomes.
  • You need to be able to outline experiments aimed at distinguishing between effective and ineffective absorbers of infrared radiation.
  • The key ideas to know are Describe.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

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Describe

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

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Paper 6 structured question: Radiation

Paper 6Alternative to PracticalPractical1 marks

Method

Method for Testing Infrared Absorption

Different materials are placed at equal distances from an infrared lamp. The temperature of each material is measured after a set time of exposure to the lamp.

MaterialInitial Temperature (°C)Final Temperature (°C)
Black paper2045
White paper2030
Aluminum foil2025
Glass2022
  1. a

    Identify Identify the independent variable in this experiment.

    Aim for approximately 1 distinct marking point.

    [1]
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