1. when is it appropriate to think of
light consisting of waves or consisting of particles.
light can behave as wave and as a particle at the
same time , light waves can interfere and diffract around corner and sharp
edges like other waves , this two properties interference and diffractions
proves that light are actually waves,
light can also reflect and refract as demonstrated by plane mirror and
lenses , this shows that light are waves. light are light longitudinal waves
can travel independent of a vacuum.
light can be said to be particles (photons)
because they undergo Compton effects and photoelectric effects, for light to
undergo Compton effect it must have mass, therefore light exist as particles in
form of photons or discrete of radiations.
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