Fa08_7C_4

Fa08_7C_4 - Quiz 3 1 Physics 7C Fall 2008 Lecture 4...

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1 Quiz 3
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Physics 7C Fall 2008 Lecture 4 Standing Waves Hitting an Interface Ray Representation Beginning Optics
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3 Standing Waves Applet from Santa Barbara City College shows two interfering waves: http://www.cs.sbcc.edu/~physics/flash/oscillationswaves/standingwaves.html
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4 Reaching the end of a medium Observe reflection on the wave machine… “Incident” QuickTimeª and a TIFF (Uncompressed) decompressor are needed to see this picture.
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5 Hitting an Interface Inverted Upright
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6 Hitting an Interface Reflection and Transmission “Incident” or “Reflected” “Transmitted” “Reflected” “Transmitted”
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7 Wavefronts and Rays A wavefront represent points of equal phase (e.g. the crest of the wave). The ray shows the direction in which the wavefront is moving. Rays are perpendicular to wavefronts.
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8 From spherical to planar wavefronts Planar wave front Spherical wave front
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9 Identify the representation: 1 2 (a) Both wavefront (b) Both ray (c) 1 is wavefront, 2 is ray (d) 1 is ray, 2 is wavefront
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Fa08_7C_4 - Quiz 3 1 Physics 7C Fall 2008 Lecture 4...

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