6. [Essay] Sodium light (589nm) produces diffraction fringes on the screen at 1m after passing through a single slit. If the distance between two ± 1st-order dark lines is 2mm, find the width of the single slit.
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![6. [Essay] Sodium light (589nm) produces
diffraction fringes on the screen at 1m after
passing through a single slit. If the distance
between two ± 1st-order dark lines is 2mm,
find the width of the single slit.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F4f0152cc-7a39-41b9-a5ca-1627eec82c0c%2F12e6b481-08af-4e23-a30a-a20bca4aa1f1%2F62b7pmk.jpeg&w=3840&q=75)
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