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प्रश्न
Why does the sun appear red at sunrises and sunset?
उत्तर
At the time of sunrise and sunset, the light from sun has to travel the longest distance of atmosphere to reach the observer. The light travelling from the sun loses blue light of short wavelength due to scattering, while the red light of long wavelength is scattered a little, so is not lost much. Thus blue light is almost absent in sunlight reaching the observer, while it is rich in red colour.
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संबंधित प्रश्न
Why does the sun appear reddish early in the morning? Will this phenomenon be observed by an observer on the moon? Justify your answer with a reason.
What colours make up white light?
Which colour of the spectrum has
shortest wavelength?
How many colours are there in a full spectrum of white light? Write the various colours of spectrum in the order, starting with red.
Out of blue light and red light, which one is scattered more easily?
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 ................
Which phenomenon is responsible for making the path of light visible?
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.
The danger signals installed at the top of tall buildings are red in colour. These can be easily seen from a distance because among all other colours, the red light ____________.
Why is the colour of the clear sky blue?
