NCERT/Class 12/Physics/Wave Optics

Wave Optics

Class 12 · Physics

39 questions14 easy14 medium11 hard

Sample Questions

Q1.Malus' law states that when polarised light of intensity I₀ passes through a polaroid at angle θ to its pass-axis, the transmitted intensity is:

  • AI = I₀ sin²θ
  • BI = I₀ cos θ
  • CI = I₀ cos²θ
  • DI = I₀/2

Q2.Which of the following confirms the transverse nature of light?

  • AInterference
  • BDiffraction
  • CRefraction
  • DPolarisation

Q3.In Young's double slit experiment, if the two slits are illuminated by two separate (independent) sodium lamps instead of a single source through one slit, the result is:

  • AFringes with double brightness
  • BNarrower fringes
  • CNo interference fringes
  • DFringes with half the width

Q4.In Young's double slit experiment, the slits are separated by d = 0.28 mm and the screen is at D = 1.4 m. If the 4th bright fringe is 1.2 cm from the central maximum, what is the wavelength of light?

  • A600 nm
  • B500 nm
  • C589 nm
  • D700 nm

Q5.For a plane wavefront at a large distance from a point source, the wavefront shape is:

  • ASpherical
  • BCylindrical
  • CPlanar (plane wavefront)
  • DConical

Q6.This is a sample question to preview what you'll get in the full practice test...

  • A. Option one
  • B. Option two
  • C. Option three
  • D. Option four
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Concepts Covered

Coherent SourcesConstructive and Destructive InterferenceFringe WidthHuygens PrincipleMalus LawPath Difference and Phase DifferencePolarisationReflection using Huygens PrincipleRefraction using Huygens PrincipleSecondary WaveletsSingle Slit DiffractionWavefrontYoung's Double Slit Experiment

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