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प्रश्न
What happens when a beam of sunlight enters a dusty room through a window? Explain your answer.
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उत्तर
A beam of sunlight becomes visible when it enters a dusty room through a window. This is because the dust particles present in the air in the room scatter the light all around the room. This scattered light enters our eyes, enabling us to see the beam of sunlight.
संबंधित प्रश्न
With the help of a labelled diagram, explain why the sun appears reddish at the sun-rise and the sun-set.
Name the scientist who discovered that sunlight consists of seven colours.
Where in nature can you find evidence that white sunlight may be made of different colours?
We can see the sun before the actual sunrise by about:
(a) 5 minutes
(b) 2 minutes
(c) 2 hours
(d) 20 minutes
The sky appears blue because some of the blue component of sunlight is scattered by:
(a) gas molecules present in air
(b) dust particles present in air
(c) water droplets suspended in air
(d) soot particles present in air
Complete the following statement:
When the sun is setting, the light from it has to travel a ................ thickness of the earth's atmosphere and only ................ wavelength ................ light is able to reach us. Sunset is therefore ................
In white light of sun, maximum scattering by the air molecular present in the earth’s atmosphere is for ______.
State the difference in colours of the sun observed during sunrise/sunset and noon. Give explanation for each.
Why is the Tyndall effect shown by colloidal particles?
Twinkling of stars is due to atmospheric
