1. Mass: Matter has mass, meaning it has inertia and is affected by gravity. Light, on the other hand, has no rest mass. While it carries energy and momentum, these are not the same as mass.
2. Volume: Matter occupies space and has a definite volume. Light, being a wave, doesn't occupy space in the same way as matter does.
3. Composition: Matter is made up of atoms and molecules. Light, however, is made up of fundamental particles called photons. Photons are not considered to be matter.
Here's a simple analogy:
Imagine a pool table. The balls on the table are matter - they have mass, take up space, and are made of atoms. The cue ball striking the other balls and transferring energy is like light. The energy travels through the pool table but doesn't leave behind any matter in its path.
What light is:
Light is a form of electromagnetic radiation. This means it is a wave that travels through space carrying energy and momentum. It can interact with matter, such as causing electrons in atoms to jump to higher energy levels, but it doesn't have the characteristics of matter itself.
In summary: Light is a fundamental force of nature that exhibits wave-like properties. It doesn't possess the key characteristics of matter, namely mass, volume, and composition, and therefore is not considered a form of matter.
