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