Here's why:
* Matter is anything that has mass and takes up space. Sunlight is made of electromagnetic radiation, specifically photons.
* Photons are massless particles. They have energy, but they don't have mass like matter does.
* Photons do not take up space in the way that matter does. While they have wave properties and can be absorbed, they don't occupy a fixed volume.
Therefore, while sunlight can interact with matter and cause changes, it is not considered matter itself.
