Central max width = 2λD/a. If a → a/2, width doubles.
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JEE Advanced 2026 — Physics Optics
hard
mcq
2026
Official previous-year question
Verified 30 May 2026.
Question
In a single slit diffraction, the width of central maximum is doubled when:
Options
- A
Slit width is doubled
- B
Slit width is halved
- C
Wavelength is halved
- D
Distance to screen is halved
Solution
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