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  1. The blue colour of water in the sea is due to

  2. A.

     Absorption of other colours except blue by water molecules

    B.

     Scattering of blue light by water molecules

    C.

     Reflection of blue light by impurities in sea water

    D.

     Reflection of blue sky by sea water

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  3. The bending of light when it passes around a corner or a slit is due to ________

  4. A.

     Reflection

    B.

     Refraction

    C.

     Diffraction

    D.

     Total internal reflection

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  5. The colour of the ocean appears to be blue because the sunlight falling on it is

  6. A.

     Reflected

    B.

     Refracted

    C.

     Diffracted

    D.

     Scattered

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  7. Which of the following statements is true when we see ''rainbow' ?

  8. A.

     We face sun and raindrops

    B.

     The Sun remains behind us and we face raindrops

    C.

     In light rainfall, we face Sun

    D.

     The sky remains clear and the sun is at lower position in the sky

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  9. Danger signals are generally red as red light

  10. A.

     Is least bright

    B.

     Undergoes least deviation

    C.

     Has lowest velocity

    D.

     Gives comfort to eye

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  11. A thin oil film on a water surface appears coloured because of

  12. A.

     Reflection

    B.

     Interference

    C.

     Diffraction

    D.

     Polarization

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  13. The blue colour of sky is due to

  14. A.

     Reflection of sunlight

    B.

     Refraction of sunlight

    C.

     Scattering of shorter wavelengths of sunlight in the atmosphere

    D.

     Scattering of longer wavelengths of sunlight in the atmosphere

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  15. The phenomenon of light associated with the appearance of blue colour of the sky is

  16. A.

     Interference

    B.

     Reflection

    C.

     Refraction

    D.

     Scattering

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  17. The sky appears blue because of

  18. A.

     Atmospheric water vapour

    B.

     Scattering of light

    C.

     Reflection on sea water

    D.

     Emision of blue wavelength by the sun

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  19. Light scattering takes place in

  20. A.

     Colloidal solutions

    B.

     Acidic solutions

    C.

     Electrolyte solutions

    D.

     Basic solutions

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