Light is a form of electromagnetic radiation that is visible to the human eye. It is composed of particles called photons, which have both wave-like and particle-like properties, a concept known as wave-particle duality.
Light travels in waves and can exhibit behaviors such as reflection, refraction, diffraction, and interference. Electromagnetic radiation spans a range of wavelengths, and visible light occupies a small portion of this spectrum, typically ranging from about 400 to 700 nanometers in wavelength.
In addition to being a fundamental aspect of physics, light plays a critical role in various scientific fields, including optics, astronomy, and telecommunications. It also carries energy and information and is crucial in processes such as photosynthesis in plants.