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प्रश्न
State the difference in colours of the sun observed during sunrise/sunset and noon. Give explanation for each.
उत्तर
Differences in colours of the sun at sunrise/sunset and at noon are as follows:
(i) Sunrise/ sunset: Reddish in colour
Reason: Sunlight travels longer distance at this time of the day, so the short wavelength colours get scattered away and the sunlight is left with only longer wavelength lights which is reddish or orange. So the sun appears reddish in colour.
(ii) Noon: white in colour
Reason: Sunrays travel shorter distance at noon and contains all the wavelengths of light which combine to form white colour. This makes the colour of sun white.
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संबंधित प्रश्न
Which color of white light is scattered the least and why?
Which colour of light has the shorter wavelength − red or violet?
How many colours are there in a full spectrum of white light? Write the various colours of spectrum in the order, starting with red.
Name the phenomenon due to which the stars seem higher in the sky than they actually are.
Explain why, the sun can be seen about two minutes before actual sunrise. Draw a diagram to Illustrate your answer.
What is the colour of the sunlight scattered by the air molecules in the atmosphere?
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 sides 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?
Using the phenomenon of scattering of light, explain why there is a difference in the colour of the sun as it appears during sunrise and at noon.
Explain in brief the reason for the following:
Twinkling of stars
Is the position of a star as seen by us its true position? Justify your answer.
