this is my second assigment sirr.

Why is the sunset red ?

If we look at the sunset, we will find that it is usually red, with the colour spreading across the sky. Sometimes on a hot day you may notice that the sun is red too. Do you know why the sun or the sunset is red ?
Of course the sun has not suddenly changed colour. It only has that colour during a certain time of the day. In fact, people looking at the sun thousands of kilometers to the west may not find it red at all.
The colours of the sun are produced by the distance that the sunlight has to trave through the atmosphere. The lower the sun is in the sky, the longer the distance the light has to travel through.
We see, sunlight is a mixture of light of all colours. This mixture of light usually appears as white to our eyes. However, the atmosphere contains molecules of air, dust, water vapor and other impurities. As the light passes through them, different colours are scattered by these particles. It happens that the atmosphere scatters violet, blue, and green light more than it scatters the red or the yellow lights. When the sun is low in the sky, as during suset, most of violet, blue and green lights are scattered. This leaves only the red and yellow lights which spread across the sky at sunset. That is why we have red sunsets.





Thank's mr. arif
LAKSITARINI A
X6 . 20