Question

1. You pass 633-nm laser light through a narrow slit (single-slit) and observe the diffraction patter on a screen 6.0 m away from the slit. You find that the displacement on the screen between the centers of the first minima on both sides of the central bright fringe is 32.0 mm. Find the width of the slit.

Modern Optics, Eugene 5th Edition

Answer 1

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a k First minima 10....04 central maxima - First minima Condition for first minima, a = Da to here, as width of sut x = wavelength of light - 633 mm Da Distance between slit and screen=6m and y= distance between Frost manima to central maxima = 32 mm = 32 a 22 a 633x10 x 6 = 2.3737 5X10 30 16x lo-3 So width of suit, a = 2.34375 x1024)