Since its establishment, the research work at NPL has included all branches of physics, light, electricity and magnetism, radio communication, engineering, metallurgy, aeronautics and ship design. 8 Currently, the latest generation of LED curing devices provide consistent energy outputs of greater than 1,000 mW/cm2. in astronomy) and exploited as primary probe for the fundamental properties of nature (e.g. Light always piqued the curiosity of thinkers and scientists. In physics, light is both regarded as primary carrier of information on nature (e.g. This fact pointed to the particle nature of light, which scientists previously considered as a wave. What is Particle Nature of Light? in spectroscopy). Furthermore, if light waves were vibrations of lines of force, then a hypothetical elastic substance such as “ether” would not be needed in order to explain the propagation of light. Some of the world’s most significant innovations have origins at NPL, including radar; packet switching, the forebearer of the internet; the ACE computer; and the caesium atomic clock. Light is ubiquitous in every language, society and culture. Until 1900, physicists assumed that light travelled in the form of waves. A significant change in how resin-based composites were light cured occurred in the late 1990s, with the introduction of light-emitting diodes (LED) that provided light in the blue-visible spectrum with a range of 450 nm to 490 nm. Here, in the article, let us discuss the wave theory of light in detail. The wave theory of light proposed by Christian Huygens has stood the test of time and today, it is considered the backbones of optics. History Of The Wave Theory Of Light. Light is the key element of common life defining familiar aspects like color and warmth. Empire of Light: A History of Discovery in Science and Art Sidney Perkowitz, a condensed matter physicist, looks at the history of our understanding of light in both art and science. HISTORY OF PHYSICS including Gilbert and the amber force, Galileo and the Discorsi, Torricelli and the barometer, Von Guericke and the vacuum, Robert Boyle, Newton in the garden, Newton and Opticks, Newton and gravity, Leyden jar, Watson, Franklin and electricity, Joseph Black and latent heat Also, the intensity of light has a direct impact on the electrons thus released.