1. ELECTROMAGNETIC (EM) SPECTRUM - History
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Discovered electromagnetic waves using four equations of electromagnetism
James Clark Maxwell
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Mathematically predicted the existence of electromagnetic wave
James Clark Maxwell
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Calculated the speed of electromagnetic waves
James Clark Maxwell
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Matched the speed of light
James Clark Maxwell
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Experimentally proved EM waves when he discovered how to make radio waves
Heinrich Hertz
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Measured the speed, verified the electromagnetic wave discovery
Heinrich Hertz
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Pioneered the usage of radio waves in wireless telegraphy
Guglielmo Marconi
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