Quote:
Originally posted by cheerios
no, light does TOO have mass! remember light is both a particle and a wave, and particles have mass. 
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Light doesn't have a mass. Not all particles have mass. Many "fundamental" particles are volumeless "points" and are massless.
That being said, light does have energy, and as we know, light and mass are equivalent, but not the same. Mass is a particular (structured) form of energy. So in a way you could say that light has a mass, but not as we think of it. So it really means that it depends on what type of mass you are talking about
http://www.math.ucr.edu/home/baez/ph...ight_mass.html