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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
Which colour of the spectrum has
shortest wavelength?
Which light has the longer wavelength : red light or blue light?
Name some everyday objects:
which absorb all the colours in sunlight
Explain why, the sun can be seen about two minutes before actual sunrise. Draw a diagram to Illustrate your answer.
Explain why, if we look at objects through the hot air over a fire, the objects appear to be moving (or shaking) slightly.
Using the phenomenon of scattering of light, explain why there is a difference in the colour of the sun as it appears during sunrise and at noon.
Explain in brief the reason for the following :
Delayed sunset
State the difference in colours of the sun observed during sunrise/sunset and noon. Give explanation for each.
What is the colour of the clear sky during day time? Give reason for it.
Which colour of white light is scattered the least? Give reason.
