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Give reason why the smoke from a fire lo...

Give reason why the smoke from a fire looks white.

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**Step-by-Step Solution:** 1. **Understanding the Composition of Smoke**: Smoke is made up of tiny particles that are released when materials burn. These particles can vary in size. 2. **Relation Between Particle Size and Light Wavelength**: The key to understanding why smoke appears white lies in the relationship between the size of these particles and the wavelength of visible light. The wavelength of visible light ranges from approximately 400 nm (violet) to 700 nm (red). 3. **Scattering of Light**: When light encounters particles, it can scatter. The amount and type of scattering depend on the size of the particles relative to the wavelength of light. If the particles are larger than the wavelength of light, they scatter light of all wavelengths. ...
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ICSE-SPECTRUM-EXERCISE C
  1. How would the sky appear when seen from the space (or moon)? Give reas...

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  2. Which characteristic property of light is responsible for the blue col...

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  3. The colour of sky, in direction other than of the Sun, is blue. Explai...

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  4. (i) Why does the sun appear reddish at sun-set or sun- rise ? (ii) F...

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  5. The sky at noon appears white. Give reason.

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  6. Give reasons for the following: During the day : Clouds appear whi...

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  7. Give reason why the smoke from a fire looks white.

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  8. What is meant by scattering of light?

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  9. How does the intensity of scattered light depend onthe wavelength of i...

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  10. When sunlight enters the earth's atmosphere, state which colour of lig...

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  11. A beam of blue, green and yellow light passes through the earth's atmo...

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  12. In the atmosphere which colour of light gets scattered the least ?

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  13. Why is the colour red used as a sign of danger ?

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  14. How would the sky appear when seen from the space (or moon)? Give reas...

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  15. Which characteristic property of light is responsible for the blue col...

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  16. The colour of sky, in direction other than of the Sun, is blue. Explai...

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  17. (i) Why does the sun appear reddish at sun-set or sun- rise ? (ii) F...

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  18. The sky at noon appears white. Give reason.

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  19. The clouds are seen white. Explain.

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  20. Give reason why the smoke from a fire looks white.

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