# History of Physics and Astronomy

This version sorts the important
events by name. The lifetimes of people are highlighted in

blue, important people are in

**bold
blue**.

## B

Dalton 1766-1844

Dalton's law of partial
pressures 1804

Daniell – Daniell cell 1790-1845Dark
matter suggested – Rubin and Ford 1970

**Darwin 1809-
1882**Davy 1778-1829Davy lamp
1815

**De Broglie 1892-1987**De Broglie – Nobel
prize for Physics 1928

De Sitter 1872-1934Decay of the
neutron - Snell and Miller 1948

Decomposition of waves, harmonic analysis - Fourier
1812

Definition of metric system in France 1790

Deflection of light in a gravitational
field – total solar eclipse 1919

Deflection of magnet by current - Oersted
1820

**Democritus – idea of atoms 460-370
BC**Descartes 1596-1650Detection of
neutrinos from a supernova - Masatoshi Koshibas 1987

Deuterium – Urey and Washburn
1932

Dewar flask 1892

Dialogo dei due massimi sistemi del Mondi published -
Galileo 1632

Diesel engine 1893

Diffraction – Grimaldi 1665

Diffraction – Fresnel
theory of diffraction 1816

Diffraction grating – Rowland 1882

Diffraction of molecules
– Stern 1931

Diffraction of X rays 1899

Diffusion pump - Gaede 1915

Dip circle
1600

Dirac – Nobel prize for Physics 1933

Domain theory of ferromagnetism - Weiss
1907

**Doppler 1803-1853**Doppler effect
1842

Doppler effect in the spectra of stars – Huggins 1868

Double acting steam
engine 1782

Double stars are bodies in mutual orbit - William Herschel
1802

Dounreay critical 1959

Du Long and Petit's Law 1819

Dubna research
centre opened 1956

Dynamic method for saturated vapour pressure – Ramsay and
Young 1886

Dynamite 1869

Dynamo – Faraday 1831