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lecture 7 100914 - Optics Reflection Refraction Wave Optics...

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Optics: Reflection, Refraction 05/25/2006 Lecture 16 Wave Optics square6 The wave nature of light is needed to explain various phenomena square6 Interference square6 Diffraction square6 Polarization square6 The particle nature of light was the basis for ray (geometric) optics Interference square6 Light waves interfere with each other much like mechanical waves do square6 All interference associated with light waves arises when the electromagnetic fields that constitute the individual waves combine For Interference to Occur square6 The sources must be coherent square6 They must maintain a constant phase with respect to each other-wave go up and down together in time square6 The waves must have identical wavelengths square6 Thomas Young first demonstrated interference in light waves from two sources in 1801 square6 Light is incident on a screen with a narrow slit, S o square6 The light waves emerging from this slit arrive at a second screen that contains two narrow, parallel slits, S 1 and S 2
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