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  1. In a Laser (say neon laser) all the atoms emit the light waves of

  2. A.

     Same frequency

    B.

     Same amplitude

    C.

     Same phase

    D.

     All of the above

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  3. The Laser is a beam of radiations which are

  4. A.

     Non-coherent and monochromatic

    B.

     Coherent and monochromatic

    C.

     Non-coherent and non-monochromatic

    D.

     Coherent and non-monochromatic

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  5. In quantum mechanics a particle is represented by a

  6. A.

     Wave

    B.

     Wave packet

    C.

     Particle

    D.

     None of the above

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  7. The p wave of a normal Electrocardiogram indicates

  8. A.

     Atrial depolarization

    B.

     Ventricular repolarization

    C.

     Atrial repolarization

    D.

     Ventricular depolarization

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  9. Which of the following phenomenon helps to conclude that light is a transverse wave?

  10. A.

     Interference

    B.

     Diffraction

    C.

     Polarisation

    D.

     Refraction

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  11. What is the phenomenon which established the transverse nature of light ?

  12. A.

     Reflection

    B.

     Interference

    C.

     Diffraction

    D.

     Polarisation

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  13. Golden view of sea shell is due to

  14. A.

     Diffraction

    B.

     Dispersion

    C.

     Polarization

    D.

     Reflection

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  15. The light of distant stars is affected by

  16. A.

     Interstellar Dust

    B.

     The Earth's Atmosphere

    C.

     Both A & B

    D.

     None of the above

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  17. A soap bubble shows colours when illuminated with white light. This is due to

  18. A.

     Diffraction

    B.

     Polarisation

    C.

     Interference

    D.

     Reflection

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  19. Which of the following waves cannot be polarised?

  20. A.

     Radio

    B.

     Ultra violet

    C.

     Infrared

    D.

     Ultrasonic

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