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Wave Nature of Light MCQ 2
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Wave Nature of Light MCQ 2

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Questions and Answers

What is the minimum number of colours required to produce white light?

  • 5
  • 4
  • 2
  • 3 (correct)
  • What is the term used to describe the process of producing white light by combining a primary colour and its complementary colour?

  • Complementary (correct)
  • Recombination
  • Dispersion
  • Reflection
  • Why does an object appear black when light shines on it?

  • Because it reflects all wavelengths
  • Because it absorbs only certain wavelengths
  • Because it reflects only certain wavelengths
  • Because it absorbs all wavelengths (correct)
  • What is the term used to describe the splitting of white light into its constituent colours?

    <p>Dispersion</p> Signup and view all the answers

    What is the purpose of polarised sunglasses?

    <p>To see beneath the surface of a fluid</p> Signup and view all the answers

    What is the term used to describe the restriction of a wave's vibration to one plane?

    <p>Polarisation</p> Signup and view all the answers

    What type of colours are Red, Green, and Blue?

    <p>Primary colours</p> Signup and view all the answers

    What happens to the wavelengths of light when they hit an object?

    <p>Some wavelengths are reflected and some are absorbed</p> Signup and view all the answers

    What is the result of combining a primary colour with its complementary colour?

    <p>White light</p> Signup and view all the answers

    What is the purpose of using a second prism in an experiment?

    <p>To recombine the colours back into white light</p> Signup and view all the answers

    What is the term used to describe the restriction of a light wave's vibration to one plane?

    <p>Polarisation</p> Signup and view all the answers

    What is an application of polarisation in material testing?

    <p>To test the internal stress of materials</p> Signup and view all the answers

    Study Notes

    White Light and Colour

    • White light can be produced by combining three primary colours of equal intensity: Red, Green, and Blue.
    • All other colours can be produced by combining these three colours in varying ratios.
    • Complementary colours are produced by mixing a primary colour with its opposite secondary colour, resulting in white light.

    Colour and Reflection

    • When white light hits an object, some wavelengths are absorbed and others are reflected.
    • The object's "colour" is made up of the reflected wavelengths.
    • If the light shining on the object does not contain wavelengths that the object naturally reflects, it appears black.

    Dispersion and Recombination

    • Dispersion is the splitting up of white light into its constituent colours.
    • Dispersion can be reversed by using recombination and a second prism.

    Polarisation

    • Polarisation of a wave occurs when the direction of vibration is restricted to one plane.
    • Polarisation is used in applications such as:
      • Polarised sunglasses, which help to see beneath the surface of a fluid.
      • Testing the internal stress of materials.

    White Light and Colour

    • White light can be produced by combining three primary colours of equal intensity: Red, Green, and Blue.
    • All other colours can be produced by combining these three colours in varying ratios.
    • Complementary colours are produced by mixing a primary colour with its opposite secondary colour, resulting in white light.

    Colour and Reflection

    • When white light hits an object, some wavelengths are absorbed and others are reflected.
    • The object's "colour" is made up of the reflected wavelengths.
    • If the light shining on the object does not contain wavelengths that the object naturally reflects, it appears black.

    Dispersion and Recombination

    • Dispersion is the splitting up of white light into its constituent colours.
    • Dispersion can be reversed by using recombination and a second prism.

    Polarisation

    • Polarisation of a wave occurs when the direction of vibration is restricted to one plane.
    • Polarisation is used in applications such as:
      • Polarised sunglasses, which help to see beneath the surface of a fluid.
      • Testing the internal stress of materials.

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    Description

    Learn about the properties of white light and how colours are produced through combination and reflection. Discover how objects absorb and reflect different wavelengths of light.

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