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chapter38 - Chapter 38 Diffraction Patterns and...

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Chapter 38 Diffraction Patterns and Polarization
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Diffraction z Light of wavelength comparable to or larger than the width of a slit spreads out in all forward directions upon passing through the slit z This phenomena is called diffraction z This indicates that light spreads beyond the narrow path defined by the slit into regions that would be in shadow if light traveled in straight lines
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Diffraction Pattern z A single slit placed between a distant light source and a screen produces a diffraction pattern z It will have a broad, intense central band z Called the central maximum z The central band will be flanked by a series of narrower, less intense secondary bands z Called side maxima or secondary maxima z The central band will also be flanked by a series of dark bands z Called minima
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