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The condition of observing Fraunhalfer diffraction, from a single slit is that the wavefront incident on the slit must be
Option: 1
Spherical
Option: 2
Plane
Option: 3
Cylindrical
Option: 4
Elliptical
Answers (1)
Answer (2)
If a very small opaque disc is placed in the path of monochromatic light. It geometrical shadow has dark point at the centre surrounded by alternate bright and dark rings.
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