Contents page showing Einstein's theory on light, June 1905.
© Science Museum / Science & Society Picture Library
Contents page from volume 17 of the 4th series of 'Annalen der Physik' (Annals of physics), published in Leipzig in 1905. This peridiocal, the main German journal for physics, started in 1800 and published most of Albert Einstein's (1879-1955) seminal ideas, including: 'Uber einen die Erzeugung und Verwandlung des Lichtes betreffenden heuristischen Gesichtspunkt' (On a Heuristic Viewpoint Concerning the Production and Transformation of Light). In this paper he explained the phenomenon known as the photoelectric effect. The year 2005 marked the centenary of publication of this theory, and also of Einstein's Special Relativity Theory which posited that time does not exist at the same rate for everyone and everything.