We know that path difference for second minimum =2λ ∴ Phase difference =λ2π×2x=4π
A parallel beam of light of wavelength λ is incident normally on a narrow slit. A diffraction pattern formed on a screen placed perpendicular to the direction of the incident beam. At the second minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of slit is:
Held on 30 Apr 2013 · Verified 9 Jul 2026.
2π
3π
4π
ππ
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