Knockout NEET May 2023 (Easy Installments)
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(a) Why cannot the phenomenon of interference be observed by illuminating two pinholes with two sodium lamps?
(b) Two monochromatic waves have displacements and from coherent sources interfere to produce an interference pattern. Derive the expression for the resultant intensity and obtain the conditions for constructive and destructive interference.
(c) Two wavelengths of sodium light of 590nm and 596 nm are used in turn to study the diffraction taking place at a single slit of aperture If the distance between the silt and the screen is 1.5m, calculate the separation between the positions of the second maxima of diffraction pattern obtained in two cases.