Answer:
Directions of various minima in a diffraction pattern are given by \[{{\theta }_{n}}=\frac{n\lambda }{d}\] (i) When light of smaller wavelength\[\lambda \] is used, the diffraction pattern becomes narrower. (ii) When d decreases, \[{{\theta }_{n}}\] increases and the diffraction pattern spreads out. (iii) Interference pattern replaces the diffraction pattern.
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