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What is Tyndall effect? What is its caus...

What is Tyndall effect? What is its cause ? Name two phenomena observed in daily life based on Tyndall effect.

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Scattering of light by colloidal partices is known as Tyndall effect.
The size of a colloidal particle is relatively larger than the solute particle of a true solution. The colloidal particles first absorb energy from the incident light and then scatter this energy from their surfaces. This results in Tyndall effect. Some daily-life phenomenon based on Tyndall effect are as follows : When a fine beam of sunlight enters a smoke or dust-filled room through a small opening, the smoke or dust particles become visible due to the scattering of light.
When sunlight passes through a canopy of a dense forest, the tiny water droplets in the mist scatter light and become visible.
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ZEN PUBLICATION-THE HUMAN EYE AND THE COLOURFUL WORLD-ZEN ADDITIONAL QUESTIONS SECTION - Problem Section
  1. Write an activity for observing scattering of light in colloidal solut...

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  2. Mention any four differences between a glass slab and a glass prism.

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  3. Calculate maximum power of accomodation of a person having normal visi...

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  4. How can we determine the focal length and power of the concave lens re...

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  5. How can we determine the focal length and power of the convex lens req...

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  6. A person with a myopia eye cannot see objects beyond a distance of 1.5...

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  7. A doctor prescribes a corrective lens of power -0.5 D to a person. Fin...

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  8. Why does the power to clearly see near objects and far-off objects dim...

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  9. The far point of a myopia eye is 60 cm. Find the focal length of the l...

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  10. Ravi kept a book at a distance of 10 cm from the eyes of his friend Ha...

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  11. A lens of focal length 5 cm is being used by a student in the laborato...

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  12. A myopia person can see things clearly only when they lie between 10 c...

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  13. A person wants to read a book placed at 20 cm whereas the near poit of...

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  14. The far point of a myopia person is 200 cm. Calculate the power of a l...

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  15. Explain the structure and functioning of the human eye. How are we abl...

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  16. What is atmospheric refraction ? Use this phenomenon to explain the fo...

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  17. What is Tyndall effect? What is its cause ? Name two phenomena observe...

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  18. A beam of light is allowed to pass through two beakers A and B, contai...

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  19. Write an activity for observing scattering of light in colloidal solut...

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  20. Mention any four differences between a glass slab and a glass prism.

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