What are the sallent features of corpuscular theory of light?

Explanation

(i) Light is emitted as tiny, massless (negligibly small mass) and perfectly elastic particles called corpuscles.
(ii) As the corpuscles are very small, the source of light does not suffer appreciable loss of mass even if it emits light for a long time.
(iii) On account of high speed, they are unaffected by the force of gravity and their path is a straight line in a medium of uniform refractive index.
(iv) The energy of light is the kinetic energy of these corpuscles.
(v) When these corpuscles impinge on the retina of the eye, the vision is produced. The different size of the corpuscles is the reason for different colours of light.
(vi) When the corpuscles approach a surface between two media, they are either attracted or repelled.
(vii) The reflection of light is due to the repulsion of the corpuscles by the medium and refraction of light is due to the attraction of the corpuscles by the medium.