In Fresnels type of diffraction, a point source of light alluminates an
obstade by Wave front
a) Spherical b) Cylindrical c) Plane d) Elliptical
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Answer:
a and b
Explanation:
In Fresnel's diffraction, both source and screen are placed at finite distance from the obstacle(slit).So, the incident wavefront are either cylindrical or spherical.
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