Tyndall effect is related to the ______ of light.

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NTPC CBT 2 2016 Previous Paper 8 (Held On: 19 Jan 2017 Shift 2)
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  1. Reflection
  2. Scattering
  3. Dispersion
  4. Refraction

Answer (Detailed Solution Below)

Option 2 : Scattering
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The correct answer is scattering.

Additional Information

  • The Tyndall effect is related to the scattering of light.
  • The Tyndall effect is the phenomenon of scattering of light by particles in a colloid solution or in a very fine suspension.
  • The amount of scattering depends on the frequency of the light and the density of the particles.
  • The scattered light is inversely proportional to the fourth power of the wavelength, so blue light is scattered much more strongly than red light.
  • The Tyndall effect can be observed when sunlight passes through the canopy of a dense forest.
    • In the forest, mist contains tiny droplets of water, which act as particles of colloid dispersed in the air.

  • When white light is passed through a prism, the white light is separated into its component colors - red, yellow, green, orange, blue, and violet this phenomenon is known as the dispersion of light.
  • Between two different media, the change in direction of a wave at a boundary is known as the reflection of light.
  • A change in the direction of light when it enters a medium with a different density from the one through which it has been traveling is known as the refraction of light.
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