The particles of atmosphere which are of colloidal size can easily scatter the blue component of the light. The wavelength of blue light allows its scattering easily. That’s why it appears blue in colour.
Thomson’s model of an atom Thomson proposed the model of an atom to be similar to that of the Christmas pudding. Thomson proposed that An atom consists of a positively charged sphere and electrons are embedded into it. The negative and positive charges are equal in magnitude so the atom as a whole is electrically