wave theory of light

The wave theory of light posits that light is transmitted as an undulatory movement, or wave, from luminous bodies to objects and the eye. This concept emerged in contrast to earlier particle theories, notably championed by Isaac Newton, which proposed light consisted of tiny particles.12

Key developments in wave theory include:
* Early Observations: Phenomena like interference and diffraction, observed by scientists such as Robert Hooke and Francesco Grimaldi, suggested light behaved as waves.34
* Huygens' Principle: Christiaan Huygens formulated a principle where each point on a wavefront acts as a source of secondary wavelets, explaining reflection and refraction.34
* Young and Fresnel: Thomas Young's experiments on interference in the early 19th century provided strong evidence for light's wave nature. Augustin-Jean Fresnel later developed a comprehensive wave theory, explaining various optical phenomena.34
* Electromagnetic Theory: By the late 19th century, light was established as an electromagnetic wave, unifying electricity, magnetism, and light.3

While quantum mechanics later introduced a dual wave-particle nature of light, the wave theory remains fundamental to understanding many of its properties.2