This was given by Thomas Young, who, in the Bakerian lecture delivered before the Royal Society on the 24th of November 1803, applied his principle of the interference of light to this phenomenon.
For an example of such a diagram, see the Bakerian Lecture, 1903, Phil.
In 1854 he turned his attention to solar physics, and for the purpose of obtaining a daily photographic representation of the state of the solar surface he devised the photo-heliograph, described in his report to the British Association, "On Celestial Photography in England" (1859), and in his Bakerian Lecture (Phil.
This expedition formed the subject of the Bakerian Lecture already referred to.
Five years later he delivered before the Royal Society his first Bakerian lecture, "On some Chemical Agencies of Electricity," which J.