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 incident beam. For the first minimum of the diffraction pattern the phase difference between the rays coming from the edges of the slit is

Question

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 incident beam. For the first minimum of the diffraction pattern the phase difference between the rays coming from the edges of the slit is, 2 π, π, π 2, 0

MARKS App · Accepted Answer

As dsinθ = n λ when n = 1 dsinθ = λ the phase difference is 2 π and we get first minima.

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