What are the salient features of corpuscular theory of light?

Explanation

(i) Accoding this theory, light is emitted as tiny, massiess (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 straigh line in a medium of unifrom refractive index.
(iv) The energy of light is the kinetic of these corpuscles. When these corpuscles impinge on the retain of the eye, the vision i produced.
(v) The different size of the corpusles is the reason for different colours of light.
(vi) When the corpuscles approach a surface between two media. they are either attracted or repelied.
(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.