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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
What is meant by scattering of light? Use this phenomenon to explain why the clear sky appears blue or the Sun appears reddish at sunrise.
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.
Which of the two is scattered more easily, light of shorter wavelengths or light of longer wavelengths?
Which effect is illustrated by the observation that when a beam of sunlight enters a dusty room, then its path becomes visible to us.
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:
Which colour is observed from the front of the glass tank? Does this colour correspond to the colour of sky on a clear day or the colour of sky around the sun at sunset?
When sunlight enters the earth’s atmosphere, state which colour of light is scattered
- the most and
- which the least.
Why is the Tyndall effect shown by colloidal particles?
Draw a labelled diagram to show (i) reddish appearance of the sun at the sunrise or the sunset and (ii) white appearance of the sun at noon when it is overhead.
Which of the following statements is correct regarding the propagation of light of different colours of white light in the air?
What is the difference in colours of the Sun observed during sunrise/sunset and noon? Give explanation for each.
