While the 20th century was at large labelled as the electronic century (with electronics becoming ubiquitous), the 21st century will be the era of photonics. Einstein defined the photo as a single particle of light, which carries energy. This has realised into technology, one of which is the laser. But photonics stretches further than lasers, and is part of everyday lives as it is the backbone of the internet, is use in the detection and treatment of diseases, has endless applications in industry to measure and control processes and plants, and much more.