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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 १
At the time of sunset or sunrise, the Sun and its surroundings appear red because of the scattering of light. 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 color as blue light is largely scattered away by the particles present in the Earth's atmosphere.
उत्तर २
At sunrise, the sun is near the horizon; hence, sunlight has to travel a longer distance through the atmosphere to reach us. During this journey, most of the blue colour present in sunlight, which is of shorter wavelength, gets scattered from our line of sight. Thus, the red colour present in sunlight, which has a longer wavelength and is scattered the least, reaches our eye. As we see red light everywhere above, the sun and the surrounding sky appear red at sunrise.
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संबंधित प्रश्न
Which color of white light is scattered the least and why?
What did Newton demonstrate by his experiments with the prism?
What is the colour of the sunlight scattered by the air molecules in the atmosphere?
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.
Which component of sunlight is scattered away when the sun appears red at sunrise or sunset?
The red colour of the sun at the time of sunrise and sunset is because:
(a) red colour is least scattered
(b) blue colour is least scattered
(c) red colour is most scattered
(d) blue colour is most scattered
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