Question

We can see sky. That is in blue colour. So why only in blue? Why no red : yellow

Answer 1

see, the white light from the sun is getting refracted by our atmosphere and the light is getting scattered by very minute particles in air. white light has seven colours(VIBGYOR). blue color have very small wavelength; smaller than the size of the particle in air, so it is scattered more in the sky whereas red or yellow have larger wavelength so they are less scattered. that's why we are not able to see red or yellow , but blue