A parallel beam of light of wavelength λ 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 second minimum of the diffraction pattern, the phase difference between the rays coming from the tw

Question

A parallel beam of light of wavelength λ 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 second minimum of the diffraction pattern, the phase difference between the rays coming from the two edges of slit is:

Accepted Answer

3π. In a single-slit diffraction pattern, the phase difference at the nth minimum is given by n × 2π. For the second minimum (n = 2), the phase difference is 2 × 2π = 4π.

Solution

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