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22 July, 11:30

Which are properties of an electromagnetic wave?

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  1. 22 July, 11:48
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    -Electromagnetic waves carry transverse vibrations in electrical and magnetic fields, not vibrating particles.

    -Electromagnetic waves do not need matter to travel through - they can travel through empty space (a vacuum).

    -In a vacuum, all electromagnetic waves travel at approximately 3 x 108 m/s - the fastest speed possible.

    -When electromagnetic waves travel through matter (for example, light through air or glass), they travel a bit slower than this but rarely less than half as fast as in a vacuum. The value for light travelling through an optical fibre, for example, is taken as 2 x 108 m/s.
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