Draw a Labeled Diagram to Show (I) the Reddish Appearance of the Sun at the Sunrise Or the Sunset and (Ii) White Appearance of the Sun at Noon When It is Overhead. - Science

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Draw a labeled diagram to show
(i) the reddish appearance of the sun at the sunrise or the sunset and
(ii) white appearance of the sun at noon when it is overhead.



(i) The reddish appearance of the sun at sunrise or sunset is due to the scattering of light by the molecules of air and other fine particles in the atmosphere that have the size smaller than the wavelength of visible light from the sun near the horizon. Light travels larger distances at the horizon in the earth's atmosphere before reaching our eyes and most of the blue light and shorter wavelengths are scattered away by the particles. So, only red light, being of higher wavelength reaches us which gives the reddish appearance of the sun at sunrise or sunset. 

(ii) At noon, the sun appears white, not red, as only a little of the blue and violet colors are scattered because light from the Sun overhead would travel a relatively shorter distance.

Concept: Applications of Scattering of Light
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2019-2020 (February) Delhi(Set 3)


Why does sun appear red at sunrise and sunset?

Which color of white light is scattered the least and why?

What did Newton demonstrate by his experiments with the prism?

What colours lie on the two sides of the 'green colour' in the spectrum of white light?

What is the order of colours in a rainbow, from the outside to the inside?

Why does the sun appear red at sunset?


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?

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.

How would the sky appear when seen from the space (or moon)? Give reason for your answer.

What characteristic property of light is responsible for the blue colour of the sky?

The colour of sky, in direction other than of the sun, is blue. Explain.

Why does the sun appear red at sunrises and sunset?

The clouds are seen white. Explain

In white light of sun, maximum scattering by the air molecular present in the earth’s atmosphere is for :

Explain in brief the reason for the following :
Advanced sunrise

What is the colour of the clear sky during day time? Give reason for it.

Name the point on the lens through which a ray of light passes undeviated.

In the atmosphere which colour of light gets scattered the least?

Twinkling of stars is due to atmospheric

Blue colour of sky is due to the phenomenon of


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