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Short Stories of Science and Invention

A Collection of Radio Talks by
Charles F. Kettering

INDEX

23.  R - A - D - A - R


    The Army was also conducting experiments in the same field. In the late twenties Colonel William Blair of the Signal Corps urged the use of radio to replace the Army's sound locator. The Army and Navy pooled their information and since that time have worked in close cooperation.

    Radio waves were first used to find the direction of the object, but in 1925 Drs. Breit and Tuve of the Carnegie Institution of Washington measured the distance to the radio sky reflecting ceiling. They sent out a series of short radio pulses and measured the time it took for them to go out and be reflected back to Earth. Knowing the speed it is possible to determine distance as well as direction.

Ionosphere

    This determination of a distance involves the accurate measurement of time in millionths of a second. Radio and light waves travel about 1,000 feet per millionth of a second. For instance if the object is ten miles away, approximately 50,000 feet, it takes 100 millionths of a second for the radio signal to go out and back. This time is measured by the use of a cathode ray tube, a standard piece of apparatus in most laboratories.


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- 100 -
Sophie Germain
Gertrude Elion
Ernest Rutherford
James Chadwick
Marcel Proust
William Harvey
Johann Goethe
John Keynes
Carl Gauss
Paul Feyerabend
- 90 -
Antoine Lavoisier
Lise Meitner
Charles Babbage
Ibn Khaldun
Euclid
Ralph Emerson
Robert Bunsen
Frederick Banting
Andre Ampere
Winston Churchill
- 80 -
John Locke
Bronislaw Malinowski
Bible
Thomas Huxley
Alessandro Volta
Erwin Schrodinger
Wilhelm Roentgen
Louis Pasteur
Bertrand Russell
Jean Lamarck
- 70 -
Samuel Morse
John Wheeler
Nicolaus Copernicus
Robert Fulton
Pierre Laplace
Humphry Davy
Thomas Edison
Lord Kelvin
Theodore Roosevelt
Carolus Linnaeus
- 60 -
Francis Galton
Linus Pauling
Immanuel Kant
Martin Fischer
Robert Boyle
Karl Popper
Paul Dirac
Avicenna
James Watson
William Shakespeare
- 50 -
Stephen Hawking
Niels Bohr
Nikola Tesla
Rachel Carson
Max Planck
Henry Adams
Richard Dawkins
Werner Heisenberg
Alfred Wegener
John Dalton
- 40 -
Pierre Fermat
Edward Wilson
Johannes Kepler
Gustave Eiffel
Giordano Bruno
JJ Thomson
Thomas Kuhn
Leonardo DaVinci
Archimedes
David Hume
- 30 -
Andreas Vesalius
Rudolf Virchow
Richard Feynman
James Hutton
Alexander Fleming
Emile Durkheim
Benjamin Franklin
Robert Oppenheimer
Robert Hooke
Charles Kettering
- 20 -
Carl Sagan
James Maxwell
Marie Curie
Rene Descartes
Francis Crick
Hippocrates
Michael Faraday
Srinivasa Ramanujan
Francis Bacon
Galileo Galilei
- 10 -
Aristotle
John Watson
Rosalind Franklin
Michio Kaku
Isaac Asimov
Charles Darwin
Sigmund Freud
Albert Einstein
Florence Nightingale
Isaac Newton



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