Light of wavelength 420 nm is incident on a slit of width 0.20 mm, and a diffraction pattern is produced on a screen that is 1.80 m from the slit. What is the width of the central bright fringe? (1 nm = 10?9 m)
a. 3.8E–3 m
b. 7.6E–3 m
c. 1.2E–3 m
d. 1.4E–2 m
e. 2.0E–2 m
b
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