1. diffraction is due to the interference of light waves
a) from two plane wavefront
b) from different part of the same plane wavefront
c) from two spherical wavefront
d) from different parts of the same spherical wavefront.
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Diffraction is the tendency of a wave emitted from a finite source or passing through a finite aperture to spread out as it propagates. Diffraction results from the interference of an infinite number of waves emitted by a continuous distribution of source points.
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