Heinrich Hertz
Heinrich Rudolf Hertz was a German physicist who first conclusively proved the existence of electromagnetic waves theorized by James Clerk Maxwell's electromagnetic theory of light.
Arno Penzias & Robert Woodrow Wilson
The discovery of the cosmic microwave background radiation by accident. Penzias and Wilson were awarded the Nobel Prize for physics for their discovery.
Wilhelm Roentgen
A German physicist who produced an detected an electromagnetic radiation in the wavelength range known as x rays. Earned him the first Physics Nobel Prize.
Paul Villard
He discovered Gamma Rays while studying the radiation emanating from radium.