Advertisements
Advertisements
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?
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.
APPEARS IN
संबंधित प्रश्न
What did Newton demonstrate by his experiments with the prism?
Which phenomenon makes us see the sun:
a few minutes after actual sunset?
What colour does the sky appear to an astronaut?
Which effect is illustrated by the observation that when a beam of sunlight enters a dusty room, then its path becomes visible to us.
What is tyndall effect? Explain with an example.
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
Explain why, when the sun is overhead at noon, it appears white, but when the same sun is near the horizon at sunset, it appears red.
When sunlight enters the earth’s atmosphere, state which colour of light is scattered
- the most and
- which the least.
In the atmosphere which colour of light gets scattered the least?
What is the difference in colours of the Sun observed during sunrise/sunset and noon? Give explanation for each.
