Lecture10

Lecture10 - Major Concepts in Physics Lecture 10. Prof...

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PHY102 1 Major Concepts in Physics Lecture 10. Prof Simon Catterall Office 309 Physics, x 5978 smc@physics.syr.edu http://physics/courses/PHY102.08Spring
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PHY102 Plan for today ± Light. Ray approximation ± Reflection and refraction. Snell’s law. ± Mirrors, plane, convex and concave ± Total internal reflection ± Examples
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PHY102 Wavefronts, rays ± As wave propagates in 2 or 3 dimensions set of wave crests is called wavefront ± All points on wavefront are in phase ± Often convenient to draw a vector perpendicular to wavefront showing direction of propagation – ray ± Many problems involving light can be analyzed using these rays ….
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PHY102 .
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PHY102 Wavefronts A set of points with equal phase is called a wavefront .
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PHY102 Ray approximation ± Waves, wavefronts travel in straight lines and can be discussed in terms of rays when wavelength is much smaller than characteristic size of objects in system ² Often happens for light. Geometric optics ² It fails when diffraction/interference effects become important …
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PHY102 Huygens’s principle : At some time t, consider every point on a wavefront as a source of a new spherical wave. These
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This note was uploaded on 05/18/2008 for the course PHY 102 taught by Professor Simoncatterall during the Spring '08 term at Syracuse.

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Lecture10 - Major Concepts in Physics Lecture 10. Prof...

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