The study of science and technology includes both processes and bodies of knowledge. Scientific processes are the ways scientists investigate and communicate about the natural world. The scientific body of knowledge includes concepts, principles, facts, laws, and theories about the way the world around us works. Technology includes the technological design process and the body of knowledge related to the study of tools and the effect of technology on society. Science is continuously growing with technology today. Thanks to technology scientists have been able to better prove their theories.
Isaac Newton had assumed that light was made up of numerous small particles, in order to explain features such as its ability to travel in straight lines and reflect off surfaces. This theory was known to have its problems; although it explained reflection well, its explanation of refraction and diffraction was less pleasing. In order to explain refraction, in fact, Newton's Opticks (1704) postulated an "Aethereal Medium" transmitting vibrations faster than light, by which light (when overtaken) is put into "Fits of easy Reflexion and easy Transmission" (causing refraction and diffraction).
As optical theories changed, new, increasingly technical ether theories were proposed to explain the known properties of light; by the late 19th century, ether theories were important across the sciences, from physical chemistry to electron theory to optics and astronomy. In the early 20th century, after the acceptance of special relativity, many of the aether's hypothetical functions quickly became unnecessary.
This 1885 portrait of Louis Pasteur, by Albert Edelfelt, is a classic depiction of the pure scientist; the painting was emulated in print as well, and it adorns the cover of the first critical biography of the great chemist. Within his lifetime, Pasteur became an heroic figure within French culture, and historians' attempts to dispel some of the "Pasteurian myths" were initially met with strong resistance.