Abstract
The new sources of light (laser and led) that have been invented and developed during the last fifty-sixty years have given origin to a true scientific and technological revolution. This article synthetically follows the main steps of the history of light, which started by studying the properties of solar emission, and introducing the concept of electromagnetic wave. At the end of the 19th century there was experimental evidence that it was necessary to complicate the approach by introducing the assumption that the electromagnetic energy is a discrete, and not continuous, quantity. The new concept led to design and realization of the laser and the led. Through the utilization of these sources fundamental progress was achieved in both science and technology, by deepening the description of wave-particle dualism and of the coherence concept, by putting on a completely new basis information and communication technology, and by giving new tools to industrial and biomedical sensing.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Istituto Lombardo - Accademia di Scienze e Lettere - Rendiconti di Scienze
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
