* Matter has mass: Matter occupies space and has mass. Light has no mass.

* Matter is made of particles: Matter is composed of atoms and molecules. Light is made of photons, which are not particles in the same sense as atoms. Photons are packets of energy that exhibit wave-like properties.

* Light can travel through a vacuum: Light can travel through empty space (a vacuum), while matter cannot.

In summary: While light interacts with matter, it is not considered matter itself. Light is a form of electromagnetic radiation that travels as waves.