Lec23-1-LPN

Lec23-1-LPN - ture 23-1 ture Review Laws of Reflection and...

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cture 23- cture 23- 1 Review: Laws of Reflection and Refraction Law of Reflection A reflected ray lies in the plane of incidence The angle of reflection is equal to the angle of incidence Law of refraction A refracted ray lies in the plane of incidence The angle of refraction is related to the angle of incidence by Snell’s Law Medium 1 Medium 2 2 1 n n
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cture 23- cture 23- 2 Demo 7A-04 Plane mirror levitation
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cture 23- cture 23- 3 Total Internal Reflection All light can be reflected, none refracting, when light travels from a medium of higher to lower indices of refraction. e.g., glass (n=1.5) to air (n=1.0) But θ 1 cannot be greater than 90 degrees ! medium 2 medium 1
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cture 23- cture 23- 4 ©2008 by W.H. Freeman and Company
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cture 23- cture 23- 5 Examples Fish’s view of the world Prism used as reflectors Optical fiber
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cture 23- cture 23- 6 Chromatic Dispersion The index of refraction of a medium is usually a function of the wavelength of the light. It is larger at shorter wavelengths
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Lec23-1-LPN - ture 23-1 ture Review Laws of Reflection and...

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