CBSE  /  Class 12  /  Physics  /  Wave Optics

  • 1. 
    Poisson's bright spot was discovered by:

  • Fresnel
  • Rayleigh
  • Poisson
  • Fraunhoffer

  • 2. 
    The theory of expanding universe is confirmed by the observation of the spectral lines of the star, which shows :

  • green shift
  • red shift
  • violet shift
  • yellow shift

  • 3. 
    The application of Doppler effect are:

  • Doppler spectrometer
  • Doppler radius
  • Doppler velocimeter
  • All of these

  • 4. 
    Which of the following is conserved when light waves interefere?

  • phase
  • intensity
  • amplitude
  • none of these

  • 5. 
    In Young double slit experiment, a minimum is obtained when the phase difference of the superposing waves, is (n ∈ l):

  • nπ
  • (n + \(\frac{1}{2}\))π
  • (2n + 1)π
  • zero

  • 6. 
    The angle of minimum deviation of a prism depends upon the aggie of:

  • incidence
  • reflection
  • prism
  • none of these

  • 7. 
    he minimum value of the refractive index is:

  • zero
  • 1
  • less than 1 but not zero
  • more than 1

  • 8. 
    Polarization of light prove the :

  • corpuscular nature of light
  • quantum nature of light
  • Transverse wave nature of light
  • Longitudinal wave nature of light

  • 9. 
    Out of the following Statements which is not correct?

  • When unpolarised light passes through Nicol's prism, the emergent light is elliptically polarized
  • Nicol's prism works on the principle of double refraction and T.l.R.
  • Nicol's prism can be used both the produce and analyse polarized light
  • Calcite and Quartz are both double refracting crystal

  • 10. 
    Polaroid glasses is used in sun glasses because :

  • It reduces the light intensity to half on account of polarization
  • It is fashionable
  • It has good colour
  • It is cheaper
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