TODAY IN SCIENCE HISTORY ®  •  TODAYINSCI ®
Celebrating 24 Years on the Web
Find science on or your birthday

Today in Science History - Quickie Quiz
Who said: “As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality.”
more quiz questions >>
Home > Category Index for Science Quotations > Category Index U > Category: Undulation

Undulation Quotes (4 quotes)

Proposition IX. Radiant light consists in Undulations of the Luminiferous Ether.
'On the Theory of Light and Colours' (read in 1801), Philosophical Transactions (1802), 92, 44.
Science quotes on:  |  Consist (223)  |  Ether (37)  |  Light (635)  |  Proposition (126)  |  Radiance (7)  |  Radiant (15)

Proposition VIII. When two Undulations, from different Origins, coincide either perfectly or very nearly in Direction, their joint effect is a Combination of the Motions belonging to each.
'On the Theory of Light and Colours' (read in 1801), Philosophical Transactions (1802), 92, 34.
Science quotes on:  |  Belonging (36)  |  Combination (150)  |  Conincidence (4)  |  Difference (355)  |  Different (595)  |  Direction (185)  |  Effect (414)  |  Effort (243)  |  Joint (31)  |  Motion (320)  |  Nearly (137)  |  Origin (250)  |  Proposition (126)  |  Two (936)

The external resistance may also be varied. For instance, let mercury or some other liquid form part of a voltaic circuit, then the more deeply the conducting wire is immersed in the mercury or other liquid the less resistance does the liquid offer to the passage of the current Hence the vibration of the conducting wire in mercury or other liquid included in the circuit occasions undulations in the current…
Specification of Patent (filed 14 Feb 1876), United States Patent Office, 'Improvement in Telegraphy', No. 174, 465. Also quoted in George Bartlett Prescott, 'The Speaking Telephone, Talking Phonograph, and Other Novelties', Electric Engineering (1878), 212.
Science quotes on:  |  Circuit (29)  |  Conduct (70)  |  Current (122)  |  Depth (97)  |  External (62)  |  Form (976)  |  Immerse (6)  |  Liquid (50)  |  Mercury (54)  |  More (2558)  |  Occasion (87)  |  Offer (142)  |  Other (2233)  |  Passage (52)  |  Resistance (41)  |  Vary (27)  |  Vibration (26)  |  Voltaic (9)  |  Wire (36)

There is no more convincing proof of the truth of a comprehensive theory than its power of absorbing and finding a place for new facts, and its capability of interpreting phenomena which had been previously looked upon as unaccountable anomalies. It is thus that the law of universal gravitation and the undulatory theory of light have become established and universally accepted by men of science. Fact after fact has been brought forward as being apparently inconsistent with them, and one alter another these very facts have been shown to be the consequences of the laws they were at first supposed to disprove. A false theory will never stand this test. Advancing knowledge brings to light whole groups of facts which it cannot deal with, and its advocates steadily decrease in numbers, notwithstanding the ability and scientific skill with which it may have been supported.
From a review of four books on the subject 'Mimicry, and Other Protective Resemblances Among Animals', in The Westminster Review (Jul 1867), 88, 1. Wallace is identified as the author in the article as reprinted in William Beebe, The Book of Naturalists: An Anthology of the Best Natural History (1988), 108.
Science quotes on:  |  Ability (162)  |  Accept (198)  |  Acceptance (56)  |  Advocate (20)  |  Alter (64)  |  Anomaly (11)  |  Become (821)  |  Being (1276)  |  Capability (44)  |  Comprehensive (29)  |  Consequence (220)  |  Convincing (9)  |  Deal (192)  |  Decrease (16)  |  Disprove (25)  |  Establishment (47)  |  Fact (1257)  |  Facts (553)  |  False (105)  |  First (1302)  |  Forward (104)  |  Gravitation (72)  |  Inconsistency (5)  |  Interpreting (5)  |  Knowledge (1647)  |  Law (913)  |  Law Of Universal Gravitation (3)  |  Light (635)  |  Look (584)  |  Men Of Science (147)  |  More (2558)  |  Never (1089)  |  New (1273)  |  Notwithstanding (2)  |  Number (710)  |  Phenomenon (334)  |  Power (771)  |  Proof (304)  |  Scientific (955)  |  Scientific Method (200)  |  Skill (116)  |  Stand (284)  |  Support (151)  |  Test (221)  |  Theory (1015)  |  Truth (1109)  |  Universal (198)  |  Whole (756)  |  Will (2350)


Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
Quotations by:Albert EinsteinIsaac NewtonLord KelvinCharles DarwinSrinivasa RamanujanCarl SaganFlorence NightingaleThomas EdisonAristotleMarie CurieBenjamin FranklinWinston ChurchillGalileo GalileiSigmund FreudRobert BunsenLouis PasteurTheodore RooseveltAbraham LincolnRonald ReaganLeonardo DaVinciMichio KakuKarl PopperJohann GoetheRobert OppenheimerCharles Kettering  ... (more people)

Quotations about:Atomic  BombBiologyChemistryDeforestationEngineeringAnatomyAstronomyBacteriaBiochemistryBotanyConservationDinosaurEnvironmentFractalGeneticsGeologyHistory of ScienceInventionJupiterKnowledgeLoveMathematicsMeasurementMedicineNatural ResourceOrganic ChemistryPhysicsPhysicianQuantum TheoryResearchScience and ArtTeacherTechnologyUniverseVolcanoVirusWind PowerWomen ScientistsX-RaysYouthZoology  ... (more topics)
Sitewide search within all Today In Science History pages:
Visit our Science and Scientist Quotations index for more Science Quotes from archaeologists, biologists, chemists, geologists, inventors and inventions, mathematicians, physicists, pioneers in medicine, science events and technology.

Names index: | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

Categories index: | 1 | 2 | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Thank you for sharing.
- 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


by Ian Ellis
who invites your feedback
Thank you for sharing.
Today in Science History
Sign up for Newsletter
with quiz, quotes and more.