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. Light of wavelength 1152.2 nm from a HeNe laser is used to illuminate a long,...

. Light of wavelength 1152.2 nm from a HeNe laser is used to illuminate a long, narrow slit in an opaque screen. The center of the tenth dark band of the far-field diffraction pattern lies at an angle of 6.2o off the central axis. What is the width of the slit? If the entire apparatus were immersed in water (n=1.33) rather than air (n=1.00), at what angle would the tenth dark fringe be located?

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