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Cambridge IGCSE Combined Science practice

What is the speed of electromagnetic waves in a vacuum?

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Show answerElectromagnetic spectrum revisionRevise the key idea

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MCQ

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cambridge_mcq

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Electromagnetic spectrum

Exam-style question

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What is the speed of electromagnetic waves in a vacuum?.

  1. A.3.0 × 10^6 m/s
  2. B.3.0 × 10^7 m/s
  3. C.3.0 × 10^8 m/s
  4. D.3.0 × 10^9 m/s

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Paper 4 structured question: Electromagnetic spectrum

Paper 4Theory (Extended)2 marks

Description

Speed of Electromagnetic Waves

Electromagnetic waves travel at a speed of 3.0 × 10^8 m/s in a vacuum. This speed is a fundamental constant in physics and is essential for understanding wave behavior.

  1. a

    Explain the significance of the speed of electromagnetic waves in a vacuum.

    Aim for approximately 2 distinct marking points.

    [2]