Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Wave Optics question

2014 · Q131
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Wave Optics
  5. /2014 · Q131

Wave Optics question

2014 · Q131

NEETPhysicsWave OpticsMCQ+4 / −1
A beam of light of λ=600\lambda = 600λ=600 nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between first dark fringes on either side of the central bright fringe is
  1. A
    1.2 cm
  2. B
    1.2 mm
  3. C
    2.4 cm
  4. D
    2.4 mm
View written solutionFree

Correct answer: D

Distance between the first dark fringes on either side of the central bright fringe is also the width of central maximum.

Width of central maximum = 2λDa{{{2\lambda D} \over a}}a2λD​

= 2×600×10−9×210−3{{2 \times 600 \times {{10}^{ - 9}} \times 2} \over {{{10}^{ - 3}}}}10−32×600×10−9×2​

= 24 × 10–4 m = 2.4 × 10–3 m = 2.4 mm

PreviousNext

More from Wave Optics

  • In the Young's double slit experiment, the intensity of light at a point on the screen where the path difference λ is K, (λ being the wavelength of light used). The intensity at a point where the path difference is λ…2014 · MCQ
  • In Young's double slit experiment the distance between the slits and the screen is doubled. The separation between the slits is reduced to half. As a result the fringe width2013 · MCQ
  • A parallel beam of light of wavelength λ is incident normally on a narrow slit. A diffraction pattern formed on a screen placed perpenficular to the direction of the incident beam. At the second minimum of the diffraction pattern,…2013 · MCQ
  • The reddish appearance of the sun at sunrise and sunset is due to2013 · MCQ
  • In Young's double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths λ1​ = 12000 A∘​ and λ2​ = 10000 A∘​. At what minimum…2013 · MCQ
  • The frequency of a light wave in a material is 2 × 1014 Hz and wavelength is 5000 A∘​. The refractive index of material will be2007 · MCQ
  • The angular resolution of a 10 cm diameter telescope at a wavelength of 5000 A∘​ is of the order of2005 · MCQ
  • A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometer from two objects. The minimum distance between these two objects, which can be resolved by the telescope, when the mean wavelength of light…2004 · MCQ