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History of Light There have been six main theories of light over the past 3000 years: The tactile theory, the emission theory, the corpuscular theory, the wave theory, the electromagnetic theory and the quantum theory. The Tactile Theory This was based on the ability to touch. It stated that the eye sent out invisible probes to "feel objects". The Emission Theory This was the opposite of the tactile theory, stating that bright objects sent out beams or particles that would rebound off objects and enter the eye. It became accepted over the tactile theory by the eleventh century. The Corpuscular & Wave Theory This was put forward by Isaac Newton in 1666. Newton believed that light consisted of a stream of small particles traveling in straight lines. However, Christian Huygens and Robert Hooke did not share his views and rejected the theory. Instead, Huygens put forth a wave theory. Huygens argued that if light were made of particles,...

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