Physics - Wave Optics Question with Solution | TestHub

According to Rayleigh's criterion for resolution, two point sources are considered to be just resolved if the central maximum of the diffraction pattern of one source coincides with the first minimum of the diffraction pattern of the other source.

This ensures that the dip in intensity between the two central maxima is just sufficient for the two images to be distinguished as separate.

Answer: the first minimum of the diffraction pattern of one source coincides with the central maximum of the diffraction pattern of other source.