Light is a form of electromagnetic radiation that is visible to the human eye. It consists of electromagnetic waves with wavelengths in the range of about 400 to 700 nanometers. These waves can travel through space, and they are what allow us to see the world around us.
In addition to being a wave, light also has particle-like properties and can be thought of as being made up of tiny packets of energy called photons. This dual nature of light—both wave-like and particle-like—is known as wave-particle duality.
Light can be emitted by a variety of sources, including the sun, light bulbs, and lasers. It can also be reflected, refracted, or absorbed by different materials, which explains many of the visual phenomena we observe, such as rainbows, shadows, and the bending of light in water.