This wave family includes light, radio and X-rays and can travel through a vacuum.

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ScienceOne small aha

Your new ahaElectromagnetic waves

Radio waves, visible light and X-rays are parts of one electromagnetic spectrum. Source: Electromagnetic waves ↗

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42This colour of visible light has the longest wavelength.RECALL
Red
It has the lowest visible frequency
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43This colour of visible light has the shortest wavelength.RECALL
Violet
It has the highest visible frequency
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44This thicker-centred lens converges parallel rays of light in air.RECALL
Convex lens
It is thicker in the middle
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