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reflection standing waves group velocity
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absorbed accelerated amplitude angle angular momentum aperture Appendix atoms average Babinet's principle beam birefringent bright fringe charge circularly polarized coherent component constant cos2 crests curve dark fringe density describe detection diffraction pattern direction distance electromagnetic waves emit energy film force Fourier transform Fraunhofer Fraunhofer limit frequency function geometrical optics geometry glass grating group velocity half-wave plate identical index of refraction instance intensity interference pattern interferometer length lens linearly polarized material mathematical maxima means measure medium mirror move nodes number of wavelengths object observation point particle phasors photon Phys physical plane waves point source polarized light polarized waves position principal maximum problem pulse rays reflected result rope rotated scattered shown in Figure shows sin2 sine waves single slit sinusoidal situation solution standing wave string superposition surface vector wave equation wave fronts wave plate wave speed wavelength width zero