JEE PHYSICS MCQ: WAVE OPTICS

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A parallel monochromatic beam of light is incident normally on a narrow slit. A diffraction pattern is formed on a screen placed perpendicular to the direction of the incident beam. At the first minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of the slit is

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Correct option: D

2\pi

Option D (

2\pi

) is correct because for the first minimum in a single-slit diffraction pattern, the path difference between the rays from the edges of the slit is one wavelength, which corresponds to a phase difference of

2\pi

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