Great Physicists: The Life and Times of Leading Physicists from Galileo to Hawking

By William H. Cropper | Go to book overview

16
Science by Conversation
Niels Bohr

Hail to Niels Bohr

Quantum theory was not an overnight success. Its reception during the first decade of its history was hesitant, and its practitioners were scarce. By 1910, the Planck postulates were more or less recognized, but they had been applied mostly to problems concerning radiation and the solid state, and hardly at all in the realm of atoms and molecules. There had been no movement toward the formulation of a general quantum physics.

In the summer of 1913, there appeared in the Philosophical Magazine the first of a series of papers that began to turn the tide. The author was Niels Bohr, a twenty-eight-year-old Danish physicist with a rare personality. Bohr's theory described the behavior of atoms, particularly hydrogen atoms, with a carefully concocted mixture of the Planck postulates and the classical mechanics of Kepler and Newton. Bohr applied the theory, with spectacular success, to the beautiful spectral patterns emitted by hydrogen gas when it is excited electrically. (The physical apparatus is similar to that used in neon lighting.) This was, to the physicists of the time, an incredible achievement. Spectroscopists, the experimentalists who study the regularities of light wavelengths (spectra) emitted by atoms and molecules, had done their work so long without benefit of a theory that they had despaired of ever finding one. Bohr's papers brought new hope for spectroscopy, and for quantum theory as well.

To some extent, Bohr's role in this was good fortune. Quantum theory loomed large enough in 1913 that its value to atomic physics could not have been missed much longer. Even so, Bohr's task was no simple exercise. It took skill and intuitive sense in large measure to devise a workable mixture of classical and quantum physics. Einstein remarked that he had had similar ideas, “but had no pluck to develop them.” To Einstein, Bohr's sensitive application of the “insecure and contradictory foundation” supplied by quantum theory to atomic problems was a marvel, “the highest form of musicality in the sphere of thought.”

Bohr did more than create theoretical masterpieces. He also built, almost

-242-

Notes for this page

Add a new note
If you are trying to select text to create highlights or citations, remember that you must now click or tap on the first word, and then click or tap on the last word.
One moment ...
Default project is now your active project.
Project items

Items saved from this book

This book has been saved
Highlights (0)
Some of your highlights are legacy items.

Highlights saved before July 30, 2012 will not be displayed on their respective source pages.

You can easily re-create the highlights by opening the book page or article, selecting the text, and clicking “Highlight.”

Citations (0)
Some of your citations are legacy items.

Any citation created before July 30, 2012 will labeled as a “Cited page.” New citations will be saved as cited passages, pages or articles.

We also added the ability to view new citations from your projects or the book or article where you created them.

Notes (0)
Bookmarks (0)

You have no saved items from this book

Project items include:
  • Saved book/article
  • Highlights
  • Quotes/citations
  • Notes
  • Bookmarks
Notes
Cite this page

Cited page

Style
Citations are available only to our active members.
Sign up now to cite pages or passages in MLA, APA and Chicago citation styles.

(Einhorn, 1992, p. 25)

(Einhorn 25)

1

1. Lois J. Einhorn, Abraham Lincoln, the Orator: Penetrating the Lincoln Legend (Westport, CT: Greenwood Press, 1992), 25, http://www.questia.com/read/27419298.

Cited page

Bookmark this page
Great Physicists: The Life and Times of Leading Physicists from Galileo to Hawking
Table of contents

Table of contents

  • Title Page *
  • Contents v
  • Preface ix
  • Acknowledgments xi
  • I - Historical Synopsis 3
  • 1 - How the Heavens Go 5
  • 2 - A Man Obsessed 18
  • II - Historical Synopsis 41
  • 3 - A Tale of Two Revolutions 43
  • 4 - On the Dark Side 51
  • 5 - A Holy Undertaking 59
  • 6 - Unities and a Unifier 71
  • 7 - The Scientist as Virtuoso 78
  • 8 - The Road to Entropy 93
  • 9 - The Greatest Simplicity 106
  • 10 - The Last Law 124
  • III - Historical Synopsis 135
  • 11 - A Force of Nature 137
  • 12 - The Scientist as Magician 154
  • IV - Historical Synopsis 177
  • 13 - Molecules and Entropy 179
  • V - Historical Synopsis 201
  • 14 - Adventure in Thought 203
  • VI - Historical Synopsis 229
  • 15 - Reluctant Revolutionary 231
  • 16 - Science by Conversation 242
  • 17 - The Scientist as Critic 256
  • 18 - Matrix Mechanics 263
  • 19 - Wave Mechanics 275
  • VII - Historical Synopsis 293
  • 20 - Opening Doors 295
  • 21 - On the Crest of a Wave 308
  • 22 - Physics and Friendships 330
  • 23 - Complete Physicist 344
  • VIII - Historical Synopsis 363
  • 24 - Iγ·∂ψ = Mψ 365
  • 25 - What Do You Care? 376
  • 26 - Telling the Tale of the Quarks 403
  • IX - Historical Synopsis 421
  • 27 - Beyond the Galaxy 423
  • 28 - Ideal Scholar 438
  • 29 - Affliction, Fame, and Fortune 452
  • Chronology of the Main Events 464
  • Glossary 469
  • Invitation to More Reading 478
  • Index 485
Settings

Settings

Typeface
Text size Smaller Larger Reset View mode
Search within

Search within this book

Look up

Look up a word

  • Dictionary
  • Thesaurus
Please submit a word or phrase above.
Print this page

Print this page

Why can't I print more than one page at a time?

Full screen
/ 500

matching results for page

Cited passage

Style
Citations are available only to our active members.
Sign up now to cite pages or passages in MLA, APA and Chicago citation styles.

"Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn, 1992, p. 25).

"Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn 25)

"Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences."1

1. Lois J. Einhorn, Abraham Lincoln, the Orator: Penetrating the Lincoln Legend (Westport, CT: Greenwood Press, 1992), 25, http://www.questia.com/read/27419298.

Cited passage

Thanks for trying Questia!

Please continue trying out our research tools, but please note, full functionality is available only to our active members.

Your work will be lost once you leave this Web page.

For full access in an ad-free environment, sign up now for a FREE, 1-day trial.

Already a member? Log in now.