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#: 71 - 80

# اسم
سنة
بلد
علم
الإنجازات
71 Dmitri_Ivanovich_Mendeleev_1159.jpg
Dmitri Mendeleev

1834-1907
روسي
كيمياء

Formulating the Periodic table of chemical elements
72 Amadeo_Avogadro_1370.jpg
Amadeo Avogadro

1776-1856
إيطا
فيزياء, كيمياء

developed hypothesis that all gases at same volume, pressure, and temperature contain same number of atoms
73 Hans_Christian_Oersted_1372.jpg
Hans Christian Oersted

1777-1851
الدن
فيزياء

discovered that a current in a wire can produce magnetic effects
74 Sir_William_Hamilton_1376.jpg
William Rowan Hamilton

1805-1865
ايرل
فيزياء

developed the principle of least action and the Hamiltonian form of classical mechanics
75 Jean-Bernard-Leon_Foucault_1378.jpg
Leon Foucault

1819-1868
فرنس
فيزياء

accurately measured speed of light; invented the gyroscope; demonstrated the Earth's rotation
76 Hendrik_Antoon_Lorentz_1394.jpg
Hendrik Antoon Lorentz

1853-1928
هولن
فيزياء

introduced Lorentz transformation equations of special relativity; advanced ideas of relativistic length contraction and relativistic mass increase; contributed to theory of electromagnetism
77 Sir_James_Chadwick_1411.jpg
James Chadwick

1891-1974
المملكة المتحدة
فيزياء

discovered the neutron
78 Wolfgang_Pauli_1422.jpg
Wolfgang Pauli

1900-1958
النم
فيزياء

discovered the exclusion principle; suggested the existence of the neutrino
79 Ernest_Orlando_Lawrence_1424.jpg
Ernest Orlando Lawrence

1901-1958
الولايات المتحدة الأمريكية
فيزياء

invented the cyclotron
80 Richard_P._Feynman_1448.jpg
Richard P. Feynman

1918-1988
الولايات المتحدة الأمريكية
فيزياء

co-developed quantum electrodynamics; created a new formalism for practical calculations by introducing a graphical method called Feynman diagrams

آخر تحديث : 2018-12-14

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