Question

Difference between corpuscular theory and wave theory

Answer 1

Newton suggested that light consists of really small corpuscles (bodies) which could be reflected off surfaces and bent by lenses.

He however admitted that there were things (like interference and polarization) that could not be explained by his theory. This was where Huygens scored a point, as these were characteristics of waves.

Of course, we know now that light consists of photons which sometimes behave like particles and other times like waves.