Blue Colour of Sky
The following details are including in the objective type and descriptive type of Kerala Public Service Examinations.This points are very useful in the online test conducted by Kerala Public Service Commissions
As sunlight travels through earths atmosphere ,the light get bounced in all direction as it encounters the atmospheric particles .This is clled scattering of light .Lights of shorter wavelength is scattered more than light of longer wavelengths.Scattering of light causes the blue colour of sky and the reddening of sun at sunrise or sunset.
Speed of Sound waves through different media
(Key points in the Kerala Public Service Examinations)