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प्रश्न
Why does sun appear red at sunrise and sunset?
Why does the Sun appear red at sunrise?
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उत्तर
- At sunrise or sunset, the Sun and its surroundings appear red due to light scattering.
- At the time of sunset or sunrise, the light rays from the sun have to travel a long distance to reach our eyes through the Earth’s atmosphere.
- In other words, we can say that when we look towards the horizon, we are looking through more of Earth’s atmosphere than when we look overhead.
- The light reaching our eyes is rich in red colour, as blue light is largely scattered by the particles in Earth’s atmosphere.
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संबंधित प्रश्न
Why does the sun seem to rise two minutes before the actual sunrise and set two minutes after the actual sunset ? Explain with the help of labelled diagram.
What colours make up white light?
What is the colour of the sunlight:
scattered by the dust particles in the atmosphere?
State whether the following statements are true or false:
The scattering away of red light makes the sky appear blue during the day time.
What is tyndall effect? Explain with an example.
The blue colour of sky is due to:
(a) refraction of light
(b) dispersion of light
(c) diffraction of light
(d) scattering of light
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 ................
State the difference in colours of the sun observed during sunrise/sunset and noon. Give explanation for each.
Describe an experiment to show that “sunlight is essential for photosynthesis”.
To an astronaut in a space-ship, the earth appears ______.
