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Explain how the rate at which an object emits radiation is influenced by its surface temperature and surface area.

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Cambridge IGCSE PhysicsThermal physicsSupplement content

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Explain how the rate at which an object emits radiation is influenced by its surface temperature and surface area

  • This point belongs to Radiation, especially Radiation outcomes.
  • You need to be able to explain how the rate at which an object emits radiation is influenced by its surface temperature and surface area.
  • 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.

Key concepts

Describe

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Paper 4 structured question: Radiation

Paper 4Theory (Extended)1 marks

Description

Factors Affecting Radiation Emission

An object emits radiation based on its surface temperature and surface area. Higher temperatures lead to increased radiation emission, while larger surface areas also enhance this effect.

  1. a

    State the relationship between surface temperature and radiation emission.

    Aim for approximately 1 distinct marking point.

    [1]
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