7 terms

# The Electromagnetic Spectrum - History

Basically the people who researched the electromagnetic spectrum
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Roger Bacon
Observed visible light in the 13th century
Sir Isaac Newton
Experimented with prisms in the 17th century
William Herschel
discovered infrared (increase in temperature just beyond the red end of the visible light spectrum) in 1800
Johann Ritter
observed that just beyond the violet end has the ability ot cause a chemical reaction with certain types of metals (UV) in 1801
Heinrich Hertz
generated and detected waves; expanded this experiment for higher frequencies - Radio waves and microwaves (in 1888)
Wilhelm Roentgen
discovered radiation while conducting experiments with cathode ray tubes - x-rays (1895)
Paul Villiard
discovered gamma rays (the "last" type of electromagnetic radiation)