Lecture11

# Lecture11 - PHY102 1 Major Concepts in Physics Lecture 11...

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Unformatted text preview: PHY102 1 Major Concepts in Physics Lecture 11. Prof Simon Catterall Office 309 Physics, x 5978 [email protected] http://physics/courses/PHY102.08Spring PHY102 Anouncements ¡ Exam 2 – Wednesday March 5 in class ¢ Online: exam sample plus solutions, homework2 solutions, quiz 2 solutions ¢ Material: everything from lecture 8-12 inclusive (thermal radiation, line spectra, color mixing, ray approx, mirrors, lenses, polarization) ¢ Similar in format/style/grading to exam 1 ¢ Review session in class on Monday March 3 PHY102 Plan for today ¡ Recap basic features of geometrical optics: ray approx, reflection, refraction ¡ Simple examples of refraction ¡ Formation of images: diverging/converging mirrors/lenses. Inversion, magnification, real or virtual images ¡ Simple examples and demos PHY102 Wavefronts, rays ¡ If wavelength of wave much smaller than size of system – can use a ray approximation to calculate what happens to wave. ¡ Rays show direction of propagation. At 90 to wavefront (locus of wave crests) ¡ This approx neglects diffraction/interference effects ¡ Often valid for light ( λ =500 nm) PHY102 Reflection and refraction ¡ When light/wave passes from one medium to another eg air Æ glass one finds ¢ Reflected ray ¢ Transmitted ray ¡ Directions of these rays governed by simple laws...
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Lecture11 - PHY102 1 Major Concepts in Physics Lecture 11...

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