Helium neon laser light (632.8 nm) is sent through a single slit of width 0.30 mm. What is the width of the central maximum on a screen 1.0 m in back of the slit? ( )
A、2.0 mm
B、3.1 mm
C、4.2 mm
D、5.3 mm
发布时间：2025-02-19 01:35:09
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答案：4.2 mm
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