Q.1
In x lenses are used in Fraunhofer diffraction and y in Fresnel Diffraction, x – y is ________
  • a) 0
  • b) 1
  • c) 2
  • d) 3
Q.2
The incident wavefronts in Fresnel and Fraunhofer Diffraction are respectively _________
  • a) Planar and Planar
  • b) Planar and cylindrical
  • c) Cylindrical and Planar
  • d) Cylindrical and Cylindrical
Q.3
The diffraction patterns obtained in Fresnel and Fraunhofer Diffraction are fixed in position.
  • a) True
  • b) False
Q.4
What is the variation in the pattern observed for single slit Fresnel diffraction than single slit Fraunhofer Diffraction?
  • a) The pattern is not hyperbolic
  • b) The fringes are too thin
  • c) The region of minimum intensity is not completely dark
  • d) The fringes are colored
Q.5
The diffraction pattern changes downstream in Fresnel Diffraction.
  • a) True
  • b) False
Q.6
The surface of calculation for Fraunhofer and Fresnel diffraction patterns are respectively __________
  • a) Flat and Flat
  • b) Spherical and Flat
  • c) Flat and Spherical
  • d) Spherical and Spherical
Q.7
Light ofÅ is incident on a circular hole of radius 3 cm. How many half-period zones are contained in the circle if the screen is placed at a distance of 0.5 m?
  • a) 25
  • b) 250
  • c) 2500
  • d) 25000
Q.8
What does the figure show?
Questionengineering-physics-ii-questions-answers8.jpg
  • a) Diffraction underwater
  • b) Diffraction in a magnetic field
  • c) Cornu’s Spiral
  • d) Diffraction at a straight edge
Q.9
In Fresnel diffraction, the relative phase difference between the curved wavefront is ________
  • a) Constant
  • b) Zero
  • c) Linearly increasing
  • d) Non=constant
Q.10
The following intensity variation graph is for _____________
Questionengineering-physics-ii-questions-answers10.jpg
  • a) Single slit Diffraction
  • b) Double slit diffraction
  • c) Edge Diffraction
  • d) Cornu’s Spiral
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