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प्रश्न
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.
Why does the sky appear dark instead of blue to an astronaut?
The sky appears blue to an observer from the surface of the Earth. Explain its reason. How does the sky appear, during the day, to an astronaut staying in the international space station orbiting the Earth? State reason to justify your answer.
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उत्तर
Sunlight reaches the Earth's atmosphere and is scattered in all directions by the gases and particles in the air. Blue light is scattered more than the other colours because it has the shortest wavelength. This is why the sky appears blue to an observer from the surface of the Earth.
For an astronaut staying in the international space station orbiting the Earth, the colour of the sky will be black because the light reaching it does not scatter.
संबंधित प्रश्न
Which color of white light is scattered the least and why?
What colours lie on the two sides of the 'green colour' in the spectrum of white light?
Name some everyday objects:
which reflect all the colours in sunlight
Which of the two is scattered more easily, light of shorter wavelengths or light of longer wavelengths?
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 ................
When sunlight enters the earth’s atmosphere, state which colour of light is scattered
- the most and
- which the least.
A beam of blue, green and yellow light passes through the earth's atmosphere. Name the colour which is scattered the most.
What is the difference in colours of the Sun observed during sunrise/sunset and noon? Give explanation for each.
How can we explain the reddish appearance of sun at sunrise or sunset? Why does it not appear red at noon?
The colour of clear sky from the earth appears blue but from the space it appears black. Why?
