Photons

Photons are fundamental particles that carry light and other electromagnetic energy. They have no mass and move at the speed of light. Essentially, photons are the basic units of light, allowing electromagnetic forces to transmit energy across space. When you see light from the sun, a lamp, or a screen, you're seeing countless photons traveling and interacting with objects. They can behave both as particles and waves, which helps explain phenomena like reflection, refraction, and diffraction. Photons are essential for many technologies, including lasers, solar cells, and fiber-optic communications.