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You want to find out the width of a narrow slit. You shine a laser with...

You want to find out the width of a narrow slit. You shine a laser with wavelength 550 nm on the slit at normal incidence and observe a diffraction pattern on a screen that is 4.50m away. You measure the width of the central bright fringe on the screen to be 72.0mm. What is the width of the slit in um?

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