Cambridge IGCSE Physics practice

Paper 4 structured question: Electromagnetic spectrum

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Paper

Marks

Topic

Electromagnetic spectrum

Exam-style question

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Paper 4Theory (Extended)1 marks

Electromagnetic waves are essential in various technologies, including communication and medical imaging.

Description

Electromagnetic waves travel at approximately 3.0 x 10^8 m/s in a vacuum and nearly the same in air.

a
State the speed of electromagnetic waves in a vacuum.
Your answer
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[1]

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Paper 4Theory (Extended)1 marks

Description

The speed of electromagnetic waves in a vacuum is approximately 3.0 x 10^8 m/s, which is nearly the same in air.

a
State how the speed of electromagnetic waves in air compares to that in a vacuum.
Your answer
Aim for approximately 1 distinct marking point.
[1]