In a single-slit diff raction pattern on a fl at screen,
Chapter , Problem 63(choose chapter or problem)
In a single-slit diff raction pattern on a fl at screen, the central bright fringe is 1.2 cm wide when the slit width is 3.2 3 1025 m. When the slit is replaced by a second slit, the wavelength of the light and the distance to the screen remaining unchanged, the central bright fringe broadens to a width of 1.9 cm. What is the width of the second slit? It may be assumed that u is so small that sin u < tan u.
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