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Nickolas Blankenship
Physics
22 July, 11:30
Which are properties of an electromagnetic wave?
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Dwayne Keller
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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