$A$ single slit diffraction pattern is obtained using a beam of red light. If the red light is replaced by blue light,then:

  • A
    the diffraction pattern will disappear
  • B
    fringes will become narrower and crowded together
  • C
    fringes will become broader and will be further apart
  • D
    there is no change in the diffraction pattern

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In a single-slit diffraction experiment,if the width of the slit is reduced,what happens to the linear width of the principal (central) maxima?

The phenomenon of diffraction occurs in .......

$A$ single slit of width $0.1\, mm$ is illuminated by a parallel beam of light of wavelength $6000\, \mathring{A}$ and diffraction bands are observed on a screen $0.5\, m$ from the slit. The distance of the third dark band from the central bright band is ........ $mm$.

On which factor does the number of interference fringes in a given width of a diffraction peak depend?

Red light of wavelength $5400 \ \mathring{A}$ from a distant source falls on a slit $0.80 \ mm$ wide. Calculate the distance between the first two dark bands on each side of the central bright band in the diffraction pattern observed on a screen placed $1.4 \ m$ from the slit. (in $mm$)

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