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lec23(2x2) - Announcement Wave-Particle Duality 1 Isaac...

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11/15/11 1 Announcement No lecture on Monday Nov 21, 2011 to compensate for evening exam. Lecture Quiz scores will be updated over Thanksgiving break. After Thanksgiving break , please check your quiz scores. 11/15/11 2 Wave-Particle Duality 1. Isaac Newton (1642–1727): Light is a stream of particles. 2. Christian Huygen (1629–1695): Light is a wave. 3. Thomas Young (1801): Experimental proof that light is a wave by showing that light exhibits interference phenomena 4. Augustin Fresnel (1819): Submitted a paper on the wave theory of light to explain diffraction to the French Academy of Sciences. If correct, there should be a “Fresnel bright spot”. An Academy test of this showed its existence. 5. James Clerk Maxwell (1860): Wave theory of light 6. Albert Einstein (1905): Particle nature of light to explain the photoelectric effect 11/15/11 3 Wave-Particle Duality Isaac Newton (1642–1727) Christian Huygen (1629–1695) Thomas Young (1801) Augustin Fresnel (1819) James Clerk Maxwell(1860) Albert Einstein (1905) 11/15/11 4 Quantum of Light
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