Scientific achievements in the field of physics and astrophysics

Country

the scientist

Year

X-ray discovery

Germany

Wilhelm Roentgen

1901

Discovery and achieve Zeeman effect on the spectral lines in the presence of a magnetic field

Netherlands

Hendrik Lorentz and Pieter Zeeman

1902

The discovery of radioactivity

France

Henri Becquerel and Pierre Curie and his wife Mary

1903

The study of the density of gases and the discovery of argon gas.

The discovery of inert gases (helium - neon - ACCION - Krypton) and put them in the periodic table

Britain

John William Relay

William Ramsey

1904

Study the cathode rays and electrons

Germany

Philip von Lennart

1905

The study of the electrical discharge through gases and the discovery of electrons

Britain

Joseph Thompson

1906

The invention of optical devices to measure the speed of light

America

Albert A. Michelson

1907