a parallel beam or light or intensity i a parallel beam of light is incident a parallel beam or light or intensity i a parallel beam of light of intensity i a parallel beam of light of intensity i a parallel beam of light in air makes parallel beam of unpolarized light thin white parallel beam of light a parallel beam of light is incident a paraxial beam of light is incident on solved a beam of light in air strikes a paraxial beam of light is incident on a paraxial beam of light is incident on plane mirror fixed a certain distance a parallel beam of light is incident