Luz, or light, is a form of energy that allows us to see the world around us. It travels in waves and can be produced by natural sources like the Sun or artificial sources like light bulbs. Light is essential for photosynthesis in plants and plays a crucial role in various biological processes. In physics, light is described as both a wave and a particle, known as photons. It can be reflected, refracted, and absorbed by different materials. The visible spectrum of light includes colors ranging from red to violet, which can be seen in a rainbow when light is dispersed through water droplets.