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प्रश्न
Answer the following question:
Why is the Tyndall effect shown by colloidal particles? State four instances of observing the Tyndall effect.
उत्तर
Tyndall Effect:
It is the effect under which a ray of light scatters in all directions as soon as it encounters a colloidal or suspension particle. It is shown by colloidal particles because the colloidal particle size is roughly equal to the wavelength of the light.
Four instances of observing the Tyndall effect:
- It can be observed in the fog.
- It can be observed when light passes through the canopy in the forest.
- It is the reason for the blue color of the sky.
- It can be observed when light passes through the milk.
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संबंधित प्रश्न
Explain giving reason why the sky appears blue to an observer from the surface of the earth? What will the colour of the sky be for an astronaut staying in the international space station orbiting the earth? Justify your answer giving reason.
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Which light has the longer wavelength : red light or blue light?
Which colour of light has the shorter wavelength − red or violet?
What is the colour of the sunlight:
scattered by the dust particles in the atmosphere?
Out of blue light and red light, which one is scattered more easily?
In an experiment to study the scattering of light by passing a beam of white light through a colloidal solution of sulphur in a transparent glass tank:
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Explain in brief the reason for the following:
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Describe an experiment to show that “sunlight is essential for photosynthesis”.
