Learn about the physicist and inventor responsible for the creation of the copy machine.

Access a brief account of Carnot's discovery about heat and engine efficiency.

Biography of the Swedish scientist explains how Celsius developed the temperature measuring system that now bears his name.

Brief encyclopedia entry chronicles Celsius' astronomical studies and his development of the temperature scale that bears his name.

Find out about one of the founders of thermodynamics in this brief encyclopedia entry.

View a photograph of this English physicist who was instrumental in the development of the particle accelerator.

Reviews the Nobel Prize-winning physicist's findings about the atomic nucleus.

Explains the discoveries Compton made regarding the wavelengths of electromagnetic radiation.

Astrophysicist served as NASA's chief scientist, acted as a educational administrator and published a book called Multiwavelength Astrophysics.

Details the physicist's findings and contributions to the development of the CAT scanner.

Learn about some of the contributions Crookes made in the fields of physics and chemistry.

View a photograph of the man who invented the automatic sun valve, for use in buoys and lighthouses. Includes a short career summary.

Read about the German-born scientist's contribution to the development of the Penning trap, an invention that earned him a Nobel Prize.

Discusses the theories Dyson developed in his research of electrons, nuclei, matter and light.