MCQ on Polarization in Wave Optics

MCQ on Polarization in Wave Optics

MCQ on Polarization in Wave Optics, Multiple Choice Questions on Polarization in Wave Optics, Polarization MCQ, Wave Optics MCQ, Engineering MCQ, Objective Questions with answers on Polarization in Wave Optics, Engineering Physics MCQ

Multiple Choice Questions

Q.1. Polarisation of light shows that, light waves are:

  • longitudinal
  • transverse
  • logitudinal as well as transverse
  • none

Answer: transverse

Q.2. Light waves are transverse in nature, can be demonstrated by observing the phenomenon of:

  • interference
  • diffraction
  • polarisation
  • dispersion

Answer: polarisation

Q.3. Which phenomenon causes the polarisation of light?

  • reflection
  • diffraction
  • double refraction
  • doubel reflection

Answer: double refraction

Q.4. According to Brewster’s law, the refractive index of transparent medium is given by:

  • \mu =\tan i_{p}
  • \mu =\sin i_{p}
  • \mu =\cot i_{p}
  • \mu =\cos i_{p}

Answer: \mu =\tan i_{p}

Q.5. In a uniaxial crystal, the number of directions along which the two refracted rays travel:

  • one
  • two
  • three
  • all directions

Answer: one

Q.6. Nicol prism is based on the phenomenon of:

  • refraction
  • reflection
  • double refraction
  • scattering

Answer: double refraction

Q.7. Elliptically polarised light is produced if the amplitudes of the ordinary and extraordinary rays are unequal and there is:

  • π
  • π/2
  • π/4
  • zero

Answer: π/2

Q.8. In a dextrorotatory substances, the relation between the refractive indices of right handed and left handed circularly polarised lights is:

  • \mu _{R}> \mu _{L}
  • \mu _{R}< \mu _{L}
  • \mu _{R}= \mu _{L}
  • \mu _{R}= \sqrt{ \mu _{L}}

Answer: \mu _{R}< \mu _{L}

Q.9. When a ray of unpolarised light is passed through a uniaxial positive crystal, it is split up into two refracted rays. The relation between the refractive indices of E and 0-rays is:

  • \mu _{0}> \mu _{e}
  • \mu _{0}< \mu _{e}
  • \mu _{0}= \mu _{e}
  • \mu _{0}\geq \mu _{e}

Answer: \mu _{0}< \mu _{e}

Q.10. When a plane polarised light is incident on a quarter wave plate with its vibrations making an angle of 45° with optic axis, with the optic axis, the emergent light is:

  • elliptically polarised
  • plane polarised
  • circularly polarised
  • none of these

Answer: circularly polarised

Q.11. When unpolarised light enters a doubly refracting crystal, we get two refracted rays called ordinary 0-ray end extraordinary E-ray. Which of the following statements is true?

  • Only 0-ray is polarised
  • Only E-ray is polarised
  • Both 0 and E-rays are polarised
  • Neither 0-ray nor E-ray is polarised  

Answer: Both 0 and E-rays are polarised

Q.12. The substances that rotate the plane of polarisation are said to be:

  • Optically active
  • Optically inactive
  • Opaque
  • Polaroids

Answer: Optically active

Q.13. If the refractive index of glass is 1.5, the polarising angle will be:

  • 450
  • 33.70
  • 50.30
  • 56.30

Answer: 56.30

Q.14. If the critical angle of light in a certain substance is 450, the polarising angle for it will be:

  • 450
  • 54.70
  • 50.30
  • 56.30

Answer: 54.70

Q.15. Calcite crystal is:

  • uniaxial positive crystal
  • uniaxial negative crystal
  • biaxial positive crystal
  • biaxial negative crystal

Answer: uniaxial negative crystal

Q.16. For converting a left handed elliptically polarised light into right handed elliptically polarised light, which of the following wave plate is used:

  • half wave plate
  • quarter wave plate
  • nicol prism
  •  none of these

Answer: half wave plate

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