Scientists beginning with "R"
- Rabi, Isidor Isaac — (born 29.07.1898) is an American physicist, a member of the National Academy of Sciences (1940).
- Racah, Giulio — (9.02.1909 - 28.08.1965) was an Italian theoretical physicist.
- Radautsan, Sergei Ivanovich — (born 17.06.1926) — a Soviet physicist, an academician of the Academy of Sciences of the Moldavian SSR (1972).
- Rainwater, James — (born 9.12.1917) is an American physicist and a member of the National Academy of Sciences (1968).
- Ramachandran, Gopalasamudram — (born 8.10.1922) is an Indian physicist and biophysicist, a member of the Indian Academy of Sciences (1950), its vice-president in 1962 — 64.
- Raman, Chandrasekhara Venkata — (7.02.1888 — 21.11.1970) was an Indian physicist, a member of the Indian Academy of Sciences, its founder and president (from 1934).
- Ramsauer, Carl — (6.02.1879-24.12.1955) was a German physicist.
- Ramsay, William — (2.10.1852-23.07.1916) was an English chemist and physicist, a Fellow of the Royal Society (1888).
- Ramsden, Jesse — (6.10.1735-5.11.1800) was an English mechanic and optician, a well-known maker of physical instruments, and a Fellow of the Royal Society (1786).
- Ramsey, Norman Foster — (born 27.08.1915) — an American experimental physicist, member of the National Academy of Sciences (1952).
- Rankine, William John Macquorn — (5.07.1820-24.11.1872) was a Scottish engineer and physicist, one of the creators of technical thermodynamics, and a Fellow of the Royal Societies of Edinburgh (1850) and London (1853).
- Rasetti, Franco Dino — (born 10.08. 1901) —an Italian experimental physicist and palaeontologist, a member of the Accademia dei Lincei (1937).
- Rautian, Sergei Glebovich — (born 18.12.1928) is a Soviet physicist and a corresponding member of the USSR Academy of Sciences (1979).
- Rayleigh (Strutt), John William — (12.11.1842 —30.06.1919) was an English physicist and a Fellow of the Royal Society (1873), its president in 1905–08.
- Réaumur, René Antoine Ferchault de — (28.02.1683-18.10.1757) was a French naturalist and a member of the Paris Academy of Sciences (1708).
- Rebane, Karl Karlovich — (born 11.04.1926) is a Soviet physicist, an academician of the Academy of Sciences of the Estonian SSR (1967) and its president (from 1973), and a corresponding member of the USSR Academy of Sciences (1976).
- Regener, Erich Rudolph Alexander — (12.11.1881—27.02.1955) was a German experimental physicist.
- Regge, Tullio — (born 11.07.1931) is an Italian theoretical physicist and a corresponding member of the Accademia dei Lincei (1972).
- Reines, Frederick — (born 16.03. 1918) is an American experimental physicist and a member of the National Academy of Sciences.
- Reynolds, Osborne — (23.08.1842- 21.02.1912) was an English physicist and engineer and a Fellow of the Royal Society (1877).
- Richardson, Owen Willans — (26.04.1879—15.02.1959) was an English physicist and a Fellow of the Royal Society (1913).
- Richmann, Georg Wilhelm — (22.07.1711 — 6.08.1753) was a Russian physicist and an academician (1741).
- Richter, Burton — (born 22.03.1931) is an American experimental physicist and a member of the National Academy of Sciences (1977).
- Riecke, Carl Viktor Eduard — (1.12.1845-11.06.1915) was a German physicist.
- Righi, Augusto — (27.08.1850-8.06.1921) was an Italian physicist and a member of the Accademia dei Lincei (1898).
- Ritter, Johann Wilhelm — (16.12.1776—23.01.1810) was a German physicist and chemist and a member of the Bavarian Academy of Sciences (1804).
- Ritz, Walther — (22.02.1878-7.07.1909) was a Swiss theoretical physicist and mathematician.
- Rive, Arthur Auguste de la — (9.10.1801-27.11.1873) was a Swiss physicist.
- Rochester, George Dixon — (born 4.02.1908) is an English physicist and a Fellow of the Royal Society (1958).
- Rompe, Robert — (born 10.09.1905) is a German physicist and a member of the Academy of Sciences of the GDR (1953).
- Ronchi, Vasco — (born 19.12.1897) is an Italian physicist.
- Röntgen, Wilhelm Conrad — (27.03.1845 - 10.02.1923) was a German experimental physicist and a corresponding member of the Berlin Academy of Sciences (1896).
- Rosenbluth, Marshall Nicholas — (born 5.02.1927) is an American physicist and a member of the National Academy of Sciences (1969).
- Rosenfeld, Léon — (14. 08.1904-5.04.1974) was a Belgian theoretical physicist.
- Rosing, Boris Lvovich — (5.05.1869-20.04.1933) was a Soviet physicist and inventor and the founder of electronic television.
- Rossi, Bruno — (born 13. 04. 1905) is an Italian physicist and a member of the Accademia dei Lincei (1959).
- Rowland, Henry — (27.11.1848-16.04.1901) was an American physicist and a member of the National Academy of Sciences.
- Rozhansky, Dmitri Apollinarievich — (1.09.1882-27.09.1936) was a Soviet physicist and a corresponding member of the USSR Academy of Sciences (1933).
- Rozhdestvensky, Dmitri Sergeyevich — (7.04.1876-25.06.1940) was a Soviet physicist and an academician (1929; corresponding member 1925).
- Ruark, Arthur Edward — (9.11. 1899-1.05.1978) was an American physicist and a member of the National Academy of Sciences.
- Rubens, Heinrich — (30.03 1865-17.07.1922) was a German experimental physicist and a member of the Berlin Academy of Sciences (1907).
- Rubinowicz, Wojciech — (22.02.1889-13.10. 1974) was a Polish theoretical physicist and a member of the Polish Academy of Sciences (1952).
- Ruhmkorff, Heinrich Daniel — (15.01.1803-20.12.1877) was an inventor.
- Rumford (Thompson), Benjamin — (26.03.1753—21.08.1814) was an English physicist and a Fellow of the Royal Society (1779).
- Runge, Carl David — (30.08.1856-3.01.1927) was a German physicist and mathematician.
- Rutherford, Ernest — (30.08.1871-19.10.1937) — an English physicist, the founder of nuclear physics, a Fellow of the Royal Society (1903) and its president in 1925-30.
- Ryazin, Petr Alexandrovich — (born 20.10.1906) is a Soviet physicist, an academician of the Academy of Sciences of the Kirghiz SSR (1960) and its vice-president in 1960–65.
- Rydberg, Erik Gustav — (17.11.1902-2.01.1980) was a Swedish physicist and a member of the Royal Swedish Academy of Sciences, and in 1959 —72 its secretary.
- Rydberg, Johannes Robert — (8.11.1854 —28.12.1919) was a Swedish physicist and mathematician and a member of the Royal Swedish Academy of Sciences (1919).
- Rytov, Sergei Mikhailovich — (born 03.08.1908) is a Soviet physicist and a corresponding member of the USSR Academy of Sciences (1968).
- Ryutov, Dmitri Dmitriyevich — (born 6.03.1940) is a Soviet physicist and a corresponding member of the USSR Academy of Sciences (1976).