Features of Electromagnetic Waves
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This diagram shows the key features of electromagnetic (light) waves and introduces some of the terms used to describe them.
- Across the centre is an electromagnetic wave, shown in red.
- The wave is travelling from left to right.
- The different features of the wave are shown by labels.
- At the bottom of the diagram are short definitions of key terms.
Description
Features of Electromagnetic Waves
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About the diagram
About the diagram
- This diagram shows the key features of electromagnetic (light) waves and introduces some of the terms used to describe them.
- Across the centre is an electromagnetic wave, shown in red.
- The wave is travelling from left to right.
- The different features of the wave are shown by labels.
- At the bottom of the diagram are short definitions of key terms.
Remember that:
- Electromagnetic radiation (light) is often described in terms of waves.
- Electromagnetic waves, which are a form of electromagnetic radiation, propagate from a light source, travel through space, and encounter different materials.
- Visible light corresponds with the range of wavelengths of electromagnetic radiation that are responsible for the sense of sight.
- Visible light is a form of electromagnetic radiation, as are radio waves, infrared radiation, ultraviolet radiation, X-rays and microwaves.
- The range of wavelengths that produce visible light forms a very small part of the electromagnetic spectrum.
- Visible light is perceived as colour. The colour red has been chosen to correspond with the wavelength of this wave.
Some key terms
Wave-cycle
Frequency
Wavelength
Electromagnetic wave
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