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प्रश्न
How can we explain the reddish appearance of sun at sunrise or sunset? Why does it not appear red at noon?
उत्तर
Light from the Sun near the horizon passes through thicker layers of air and larger distance in the earth’s atmosphere before reaching our eyes. Near the horizon, most of the blue light and shorter wavelengths are scattered away by the particles. Therefore, the light that reaches our eyes is of longer wavelengths (reddish). This gives rise to the reddish appearance of the Sun.
At noon, the Sun is nearly overhead, and hence the light would travel relatively shorter distance. At noon, the Sun appears white as only a little of the blue and violet colours are scattered.
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संबंधित प्रश्न
Why does sun appear red at sunrise and sunset?
What is a rainbow? Draw a labelled diagram to show the formation of a rainbow.
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?
Out of blue light and red light, which one is scattered more easily?
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.
What characteristic property of light is responsible for the blue colour of the sky?
Explain in brief the reason for the following :
Advanced sunrise
At noon the sun appears white as:
