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E=mc2 de David Bodanis

E=mc2

Autor David Bodanis
en Limba Engleză Paperback – 11 aug 2016

Notăm cu interes faptul că E=mc2 nu este un manual de fizică în sensul tradițional, ci o biografie culturală a celei mai faimoase ecuații din lume. În contextul programelor de popularizare a științei, lucrarea lui David Bodanis ocupă un loc aparte, transformând simbolurile abstracte în narațiuni umane vibrante. Suntem de părere că forța acestui text rezidă în structura sa ingenioasă: autorul descompune ecuația în elementele sale constitutive — energie, masă, viteză — dedicând fiecăreia capitole ce explorează descoperirile istorice care le-au făcut posibile. Această abordare completează perspectiva oferită de Why Does E=mc2? de Brian Cox, care se concentrează pe mecanica teoretică a fizicii moderne. În timp ce Cox explică 'cum' funcționează ecuația la frontierele științei contemporane, Bodanis adaugă dimensiunea istorică și umană pe care celălalt o omite, explorând dramele personale și accidentele fericite din spatele geniului. Cartea se înscrie organic în opera autorului, făcând punte între Passionate Minds — unde explorează viața lui Emilie du Châtelet — și Einstein's Greatest Mistake, oferind o imagine de ansamblu asupra evoluției gândirii științifice. Structura narativă este una progresivă, de la 'Nașterea' în biroul de brevete din Berna în 1905, până la 'Maturitatea' ecuației, marcată de momentul tragic de deasupra Japoniei din 1945 și aplicațiile moderne în astrofizică. Credem că această ediție nouă reușește să facă teoria relativității accesibilă fără a sacrifica rigoarea, oferind un aparat critic util prin notele și ghidul de lectură suplimentară de la final.

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Specificații

ISBN-13: 9781509822188
ISBN-10: 1509822186
Pagini: 352
Dimensiuni: 128 x 198 x 27 mm
Greutate: 0.25 kg
Ediția:New Edition
Editura: Pan Macmillan

De ce să citești această carte

Recomandăm această carte oricărui cititor curios care dorește să înțeleagă fundamentul universului nostru fără a se pierde în formalism matematic. Câștigați o perspectivă istorică rară asupra modului în care ideile abstracte modelează realitatea politică și tehnologică. Este volumul ideal pentru a demistifica geniul lui Einstein, oferind o poveste captivantă despre ambiție, sacrificiu și triumf intelectual, scrisă de unul dintre cei mai buni comunicatori de știință actuali.

Despre autor

David Bodanis a studiat matematică, fizică și istorie la Universitatea din Chicago și a predat timp de mulți ani cursul „Intellectual Tool-Kit” la Universitatea Oxford. Reputația sa de scriitor de popularizare a științei a fost consolidată de succesul internațional al volumului E=mc2, adaptat ulterior într-un documentar premiat. Dincolo de activitatea literară, Bodanis este un futurolog și consultant de business respectat, colaborând cu World Economic Forum și Royal Dutch Shell pentru modelarea scenariilor economice viitoare, experiență care îi conferă o viziune unică asupra impactului tehnologiei în societate.

Descriere scurtă

'A lucid, even thrilling, study: the very best kind of science journalism. I didn't know I could know so much' Fay Weldon, Washington Post
In 1905, Albert Einstein produced five historic papers that shattered many cherished scientific beliefs. One of those papers introduced the theory of special relativity and his legendary equation, E=mc2. Generations have grown up knowing that this equation changed the shape of our world, but without understanding what it really means and why it is so significant.
In this fascinating biography, David Bodanis tells the story of one of the greatest scientific discoveries in history, plotting the course of the equation through the twentieth century, showing how our lives have been revolutionized by its applications, and looking far ahead to the future.
But, as with any biography, it is the human stories that really ignite the subject - stories of love, courage and tragedy, of near misses, disappointments and disasters that, brought together in this remarkable book, turn Einstein's seemingly impenetrable theory into a dramatic and accessible human achievement.
'Informative and highly readable . . . E=mc2 is a wonderful romp through Einstein's famous formula . . . this is everything a popular science book should be' Daily Express
'An outstanding introduction to relativity by a gifted practitioner of popular science' Independent
'Fascinating reading' George Walden, Sunday Telegraph

Descriere

'David Bodanis attempts to expalin the meaning, beauty and implications of the most famous equation in physics. Thanks to his clarity, wit and enthusiasm, he succeeds.' Simon Singh, Daily Telegraph

Cuprins

Preface
Part 1: Birth
1. Bern Patent Office, 1905
Part 2: Ancestors of E=mc²
2. E is for Energy
3. =
4. m Is for mass
5. c Is for celeritas
6. ²
Part 3: The Early Years
7. Einstein and the Equation
8. Into the Atom
9. Quiet in the Midday Snow
Part 4: Adulthood
10. Germany's Turn
11. Norway
12. America's Turn
13. 8:16 AM - Over Japan
Part 5: Til the End of Time
14. The Fires of the Sun
15. Creating the Earth
16. A Brahmin Lifts His Eyes Unto the Sky
Epilogue: What Else Einstein Did
Appendix: Follow-Up of Other Key Participants
Notes
Guide to Further Reading
Acknowledgments
Index

Recenzii

"This is not a physics book. It is a history of where the equation [E=mc2] came from and how it has changed the world. After a short chapter on the equation's birth, Bodanis presents its five symbolic ancestors in sequence, each with its own chapter and each with rich human stories of achievement and failure, encouragement and duplicity, love and rivalry, politics and revenge. Readers meet not only famous scientists at their best and worst but also such famous and infamous characters as Voltaire and Marat...Bodanis includes detailed, lively and fascinating back matter...His acknowledgements end, 'I loved writing this book.' It shows." —The Cleveland Plain Dealer

"E=mc2, focusing on the 1905 theory of special relativity, is just what its subtitle says it is: a biography of the world's most famous equation, and it succeeds beautifully. For the first time, I really feel that I understand the meaning and implications of that equation, as Bodanis takes us through each symbol separately, including the = sign...there is a great 'aha!' awaiting the lay reader." —St. Louis Post-Dispatch

"'The equation that changed everything' is familiar to even the most physics-challenged, but it remains a fuzzy abstraction to most. Science writer Bodanis makes it a lot more clear." —Discover

"Excellent...With wit and style, he explains every factor in the world's most famous and least understood equation....Every page is rich with surprising anecdotes about everything from Einstein's youth to the behind-the-scenes workings of the Roosevelt administration. Here's a prediction: E=mc2 is one of those odd, original, and handsomely written books that will prove more popular than even its publisher suspects." —Nashville Scene

"You'll learn more in these 300 pages about folks like Faraday, Lavoisier, Davy and Rutherford than you will in many a science course...a clearly written, astonishingly understandable book that celebrates human achievement and provides some idea of the underlying scientific orderliness and logic that guides the stars and rules the universe." —Parade

"Bodanis truly has a gift for bringing his subject matter to life." —Library Journal [starred review]

"Entertaining...With anecdotes and illustrations, Bodanis effectively opens up E=mc2 to the widest audience." —Booklist

"Accessible...he seeks, and deserves, many readers who know no physics. They'll learn a handful-more important, they'll enjoy it, and pick up a load of biographical and cultural curios along the way." —Publishers Weekly

Notă biografică

David Bodanis studied mathematics at the University of Chicago and in 1988 became a Senior Associate Member of St. Anthony's College in Oxford, England. From 1991-97, he lectured at the University of Oxford, designing the university's main survey of social science methods. Author of several books, he is an ideas consultant to corporations and organizations worldwide. A native of Chicago, he lives in London with his family.

Extras

Part 1, Birth

13 April 1901

Professor Wilhelm Ostwald
University of Leipzig
Leipzig, Germany

Esteemed Herr Professor!

Please forgive a father who is so bold as to turn to you, esteemed Herr Professor, in the interest of his son.

I shall start by telling you that my son Albert is 22 years old, that . . . he feels profoundly unhappy with his present lack of position, and his idea that he has gone off the tracks with his career &is now out of touch gets more and more entrenched each day. In addition, he is oppressed by the thought that he is a burden on us, people of modest means. . . .

I have taken the liberty of turning [to you] with the humble request to . . . write him, if possible, a few words of encouragement, so that he might recover his joy in living and working.

If, in addition, you could secure him an Assistant's position for now or the next autumn, my gratitude would know no bounds. . . .

I am also taking the liberty of mentioning that my son does not know anything about my unusual step.

I remain, highly esteemed Herr Professor,
your devoted
Hermann Einstein

No answer from Professor Ostwald was ever received.

The world of 1905 seems distant to us now, but there were many similarities to life today. European newspapers complained that there were too many American tourists, while Americans were complaining that there were too many immigrants. The older generation everywhere complained that the young were disrespectful, while politicians in Europe and America worried about the disturbing turbulence in Russia. There were newfangled "aerobics" classes; there was a trend-setting vegetarian society, and calls for sexual freedom (which were rebuffed by traditionalists standing for family values), and much else.
The year 1905 was also when Einstein wrote a series of papers that changed our view of the universe forever. On the surface, he seemed to have been leading a pleasant, quiet life until then. He had often been interested in physics puzzles as a child, and was now a recent university graduate, easygoing enough to have many friends. He had married a bright fellow student, Mileva, and was earning enough money from a civil service job in the patent office to spend his evenings and Sundays in pub visits, or long walks-above all, he had a great deal of time to think.

Although his father's letter hadn't succeeded, a friend of Einstein's from the university, Marcel Grossman, had pulled the right strings to get Einstein the patent job in 1902. Grossman's help was necessary not so much because Einstein's final university grades were unusually low-through cramming with the ever-useful Grossman's notes, Einstein had just managed to reach a 4.91 average out of a possible 6, which was almost average-but because one professor, furious at Einstein for telling jokes and cutting classes, had spitefully written unacceptable references. Teachers over the years had been irritated by his lack of obedience, most notably Einstein's high school Greek grammar teacher, Joseph Degenhart, the one who has achieved immortality in the history books through insisting that "nothing would ever become of you." Later, when told it would be best if he left the school, Degenhart had explained, "Your presence in the class destroys the respect of the students."

Outwardly Einstein appeared confident, and would joke with his friends about the way everyone in authority seemed to enjoy putting him down. The year before, in 1904, he had applied for a promotion from patent clerk third class to patent clerk second class. His supervisor, Dr. Haller, had rejected him, writing in an assessment that although Einstein had "displayed some quite good achievements," he would still have to wait "until he has become fully familiar with mechanical engineering."

In reality, though, the lack of success was becoming serious. Einstein and his wife had given away their first child, a daughter born before they were married, and were now trying to raise the second on a patent clerk's salary. Einstein was twenty-six. He couldn't even afford the money for part-time help to let his wife go back to her studies. Was he really as wise as his adoring younger sister, Maja, had told him?

He managed to get a few physics articles published, but they weren't especially impressive. He was always aiming for grand linkages-his very first paper, published back in 1901, had tried to show that the forces controlling the way liquid rises up in a drinking straw were similar, fundamentally, to Newton's laws of gravitation. But he could not quite manage to get these great linkages to work, and he got almost no response from other physicists. He wrote to his sister, wondering if he'd ever make it.

Even the hours he had to keep at the patent office worked against him. By the time he got off for the day, the one science library in Bern was usually closed. How would he have a chance if he couldn't even stay up to date with the latest findings? When he did have a few free moments during the day, he would scribble on sheets he kept in one drawer of his desk-which he jokingly called his department of theoretical physics. But Haller kept a strict eye on him, and the drawer stayed closed most of the time. Einstein was slipping behind, measurably, compared to the friends he'd made at the university. He talked with his wife about quitting Bern and trying to find a job teaching high school. But even that wasn't any guarantee: he had tried it before, only four years earlier, but never managed to get a permanent post.

And then, on what Einstein later remembered as a beautiful day in the spring of 1905, he met his best friend, Michele Besso ("I like him a great deal," Einstein wrote, "because of his sharp mind and his simplicity"), for one of their long strolls on the outskirts of the city. Often they just gossiped about life at the patent office, and music, but today Einstein was uneasy. In the past few months a great deal of what he'd been thinking about had started coming together, but there was still something Einstein felt he was very near to understanding but couldn't quite see. That night Einstein still couldn't quite grasp it, but the next day he suddenly woke up, feeling "the greatest excitement."

It took just five or six weeks to write up a first draft of the article, filling thirty-some pages. It was the start of his theory of relativity. He sent the article to Annalen der Physik to be published, but a few weeks later, he realized that he had left something out. A three-page supplement was soon delivered to the same physics journal. He admitted to another friend that he was a little unsure how accurate the supplement was: "The idea is amusing and enticing, but whether the Lord is laughing at it and has played a trick on me-that I cannot know." But in the text itself he began, confidently: "The results of an electrodynamic investigation recently published by me in this journal lead to a very interesting conclusion, which will be derived here." And then, four paragraphs from the end of this supplement, he wrote it out.

E=mc2 had arrived in the world.

—Reprinted from E=mc2, A Biography of the World's Most Famous Equation by David Bodanis by permission of Berkley, a member of Penguin Putnam Inc. Copyright © 2000, David Bodanis. All rights reserved. This excerpt, or any parts thereof, may not be reproduced in any form without permission.