Edexcel IGCSE Physics 3.10 Electromagnetic Spectrum Questions

The electromagnetic spectrum includes radio, microwave, infrared, visible, ultraviolet, X-ray and gamma radiation. All electromagnetic waves travel at the same speed in free space.

Exam points

Identify infrared radiation as the part of the electromagnetic spectrum that gives the greatest temperature rise in a thermal demonstration.
Recognize visible light, infrared and microwave signals as electromagnetic waves, and state that they travel at the same speed in a vacuum.

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The photograph shows infrared heating lamps being used to harden fresh paint on a car.

Figure for Question Edexcel IGCSE Physics 3.10 Electromagnetic Spectrum Questions question 1 — Edexcel IGCSE Physics

The heating lamps produce visible light waves in addition to infrared waves.

Give two similar properties of visible light waves and infrared waves.

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Edexcel IGCSE Physics 3.10 Electromagnetic Spectrum Questions question 1