The Biggest Scientific Controversies and Debates that Shook the World of Knowledge

The Nature of Light

Is light a wave or a particle? This question stumped scientists for centuries. The wave theory of light, proposed by Huygens, and the particle theory, proposed by Newton, both had their supporters. The debate was finally resolved in the 20th century with the advent of quantum mechanics, which established light as both a wave and a particle, a concept known as wave-particle duality.