The first, wave mechanics, was a mathematically accessible theory based on Louis de Broglie's idea that matter can behave as waves just as electromagnetic waves can behave as particles. Albert Einstein's Year of Miracles: Light Theory One hundred years ago today, Albert Einstein finished a scientific paper that would change the world. It's only when the mass of a particle gets small enough that its wavelike properties show up. Light consists of particles known as photons and matter are made up of particles known as protons, electrons, and neutrons. His impact on our understanding of the nature of light is immense. Any successful theory of the nature of light must be able to explain these and other optical phenomena. Quantum theory tells us that both light and matter consists of tiny particles which have wavelike properties associated with them.Light is composed of particles called photons, and matter is composed of particles called electrons, protons, neutrons. Quantum theory describes that matter, and light consists of minute particles that have properties of waves that are associated with them. Light Wave Theory. Also studied is the polarization of light. Quantum mechanics deals with behaviour of nature on the atomic scale or smaller. Light can exhibit both a wave theory, and a particle theory at the same time. As an astronomer, he discovered Saturn’s satellite Titan, the Saturn’s ring, and the Great Nebula of Orion with a self-fabricated telescope of magnification of 50x. In 1690, Christian Huygens proposed a theory that explained light as a wave phenomenon. Let’s understand how the light behaves as a particle and as a wave. As a result of quantum mechanics, this gave the proof of the dual nature of light and therefore not a contradiction. The revival of the particle theory of light, and the beginning of the modern concept of the photon, is due to Albert Einstein (1879–1955). He is the founding figure of both quantum mechanics and the theory of relativity. Much of the time, light behaves like a wave. In 1690, he published a paper on light advocating his theory that light is a wave or wavefront. Einstein is a giant in the history of science. The earliest scientific theories of the nature of light were proposed around the end of the 17th cent. Wave-Particle Duality of Light. The year 1926, was a critical turning point in quantum theory, because it witnessed the emergence of two new forms of quantum mechanics.