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By observing the diffraction patter, the two images are said to be just resolved when ________

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By observing the diffraction patter, the two images are said to be just resolved when ________

(a) The central maxima of one image coincide with central maxima of the other

(b) The central maxima of one do not coincide with central maxima of the other

(c) The central maxima of one image coincides with the first minimum of the other

(d) The central maxima of one image do not coincide with the first minimum of other

This question was addressed to me by my school principal while I was bunking the class.

My query is from Diffraction of Light in portion Diffraction of Engineering Physics II

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Right choice is (c) The central maxima of one image coincides with the first minimum of the other

Best explanation: In Rayleigh’s Criterion, the diffraction pattern formed is considered for resolution. According to him, two nearby images would be just resolved when the central maxima of one image coincide with the first minimum of the other and vice versa.

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