👉 The speaker is referring to light particles, which are fundamental components of light itself. In physics, light is often described as an electromagnetic wave, but it can also be understood at a more particle-like level through quantum mechanics. Light particles, or photons, are discrete packets of energy that travel through space at a constant speed. These particles have both wave-like and particle-like properties, a concept known as wave-particle duality. Photons are crucial in explaining phenomena such as the photoelectric effect, where light can eject electrons from a material, and they play a key role in various optical processes, including reflection, refraction, and absorption. Essentially, the speaker is introducing the idea that light isn't just a continuous wave but also consists of these quantized energy packets, which are essential for understanding how light interacts with matter and propagates through space.
