Chapter 38423P38.49Let the first sheet have its axis at angle θto the original plane of polarization, and let each furthersheet have its axis turned by the same angle.The first sheet passes intensityImaxcos2.The second sheet passesImaxcos4and the nth sheet lets throughIInmaxmaxcos.2090≥where =°45n.Try different integers to findcos.254550885×°FHGIKJ=cos.264560902×°FHGIKJ=.(a)So n=6(b)=°750.P38.50Consider vocal sound moving at 340 m/s and of frequency 3 000 Hz. Its wavelength isλ===vf34030000113msHzm..If your mouth, for horizontal dispersion, behaves similarly to a slit 6.00 cm wide, then amsinθλ=predicts no diffraction minima. You are a nearly isotropic source of this sound. It spreads out fromyou nearly equally in all directions. On the other hand, if you use a megaphone with width 60.0 cmat its wide end, then sin=predicts the first diffraction minimum at
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .