Legend has it that a young Isaac Newton was sitting under an apple tree when he was bonked on the head by a falling piece of fruit, a 17th-century “aha moment” that prompted him to suddenly come up with his law of gravity. In reality, things didn’t go down quite like that. Newton, the son of a farmer, was born in 1642 near Grantham, England, and entered Cambridge University in 1661. Four years later, following an outbreak of the bubonic plague, the school temporarily closed, forcing Newton to move back to his childhood home, Woolsthorpe Manor. It was during this period at Woolsthorpe (Newton returned to Cambridge in 1667) that he was in the orchard there and witnessed an apple drop from a tree. There’s no evidence to suggest the fruit actually landed on his head, but Newton’s observation caused him to ponder why apples always fall straight to the ground (rather than sideways or upward) and helped inspired him to eventually develop his law of universal gravitation. In 1687, Newton first published this principle, which states that every body in the universe is attracted to every other body with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them, in his landmark work the “Principia,” which also features his three laws of motion.
In 1726, Newton shared the apple anecdote with William Stukeley, who included it in a biography, “Memoirs of Sir Isaac Newton’s Life,” published in 1752. According to Stukeley, “After dinner, the weather being warm, we went into the garden, & drank thea under the shade of some apple trees… he told me, he was just in the same situation, as when formerly, the notion of gravitation came into his mind…. occasion’d by the fall of an apple, as he sat in a contemplative mood.”
The esteemed mathematician and physicist died in 1727 and was buried at Westminster Abbey. His famous apple tree continues to grow at Woolsthorpe Manor.
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Newton’s apple: The real story
We’ve all heard the story. A young Isaac Newton is sitting beneath an apple tree contemplating the mysterious universe. Suddenly – boink! -an apple hits him on the head. “Aha!” he shouts, or perhaps, “Eureka!” In a flash he understands that the very same force that brought the apple crashing toward the ground also keeps the moon falling toward the Earth and the Earth falling toward the sun: gravity.
Or something like that. The apocryphal story is one of the most famous in the history of science and now you can see for yourself what Newton actually said. Squirreled away in the archives of London’s Royal Society was a manuscript containing the truth about the apple.
It is the manuscript for what would become a biography of Newton entitled Memoirs of Sir Isaac Newton’s Lifewritten by William Stukeley, an archaeologist and one of Newton’s first biographers, and published in 1752. Newton told the apple story to Stukeley, who relayed it as such:
“After dinner, the weather being warm, we went into the garden and drank thea, under the shade of some apple trees…he told me, he was just in the same situation, as when formerly, the notion of gravitation came into his mind. It was occasion’d by the fall of an apple, as he sat in contemplative mood. Why should that apple always descend perpendicularly to the ground, thought he to himself…”
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The Royal Society has made the manuscript available today for the first time in a fully interactive digital form on their website at royalsociety.org/turning-the-pages. The digital release is occurring on the same day as the publication of Seeing Further (HarperPress, £25), an illustrated history of the Royal Society edited by Bill Bryson, which marks the Royal Society’s 350th anniversary this year.
So it turns out the apple story is true – for the most part. The apple may not have hit Newton in the head, but I’ll still picture it that way. Meanwhile, three and a half centuries and an Albert Einstein later, physicists still don’t really understand gravity. We’re gonna need a bigger apple.
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Did an Inspirational Apple Really Fall on Newton’s Head?
Since literally none of the latter three stories here are true (follow the preceding links for full details), you probably have your doubts about whether Newton actually sat under an apple tree and had something of a “eureka” moment concerning gravity.
It might surprise you to learn, then, that your teachers got one of these stories (partially) correct. Newton was indeed sitting under an apple tree when he had his so-called “eureka” moment on how gravity worked.
Although, it took him over two decades more to develop the fully-fledged theory of “universal gravitation”, first published in his Philosophiæ Naturalis Principia Mathematica on July 5, 1687. He also didn’t complete it without some ideas others had already come up with, such as Christopher Wren, Robert Hooke, and Edmond Halley ( who Halley’s comet is named after ); though Newton claims particularly Hooke, who corresponded heavily with Newton on gravity, and his ideas had little real bearing on his work, other than simply to inspire him to continue working on the problem.
As Newton stated when Hooke accused Newton of plagiarizing his work:
Yet am I not beholden to him for any light into that business but only for the diversion he gave me from my other studies to think on these things & for his dogmaticalness in writing as if he had found the motion in the Ellipsis, which inclined me to try it…
So perhaps “eureka” conveys much too strong of a leap. From accounts, he was more just put on the correct path while musing under the tree.
Further, it would seem that the apple didn’t fall directly on his head- at least there is no documented evidence of this. But if you discount the notion that he near instantly fleshed out his universal theory and the “fell on his head” bit, the common story is pretty accurate.
One of the best sources we have for the “apple falling on Newton’s head” anecdote is a manuscript written by Newton’s friend William Stukeley. He published Memoirs of Sir Isaac Newton’s Life in 1752, becoming one of Newton’s first biographers. Many of the incidences described in the book were recorded much earlier than 1752, including the “apple” story which was first documented in 1726, the year Newton died, and then again a year later by Voltaire in his Epic Poetry .
Stukeley’s account is as follows:
John Conduitt, Newton’s assistant and the husband of his niece, told pretty much the same story. Newton lived with the pair in his later years and doted upon their daughter. When writing about Newton, Conduitt said:
In the year he retired again from Cambridge on account of the plague to his mother in Lincolnshire & whilst he was musing in a garden it came into his thought that the same power of gravity (which made an apple fall from the tree to the ground) was not limited to a certain distance from the earth but must extend much farther than was usually thought – Why not as high as the Moon said he to himself & if so that must influence her motion & perhaps retain her in her orbit, whereupon he fell a calculating what would be the effect of that supposition but being absent from books & taking the common estimate in use among Geographers & our sea men before Norwood had measured the earth, that 60 English miles were contained in one degree of latitude his computation did not agree with his Theory & inclined him then to entertain a notion that together with the power of gravity there might be a mixture of that force which the moon would have if it was carried along in a vortex, but when the Tract of Picard of the measure of the earth came out shewing that a degree was about 69.12 English miles He began his calculation a new & found it perfectly agreeable to his Theory.
The “year [Newton] retired again from Cambridge” was 1666, which means Stukeley’s recording of the event took place some 60 years after it happened. However, both Stukeley and Conduitt, among others, appear to have independently heard the story directly from Newton himself, making it reasonable to believe a falling apple was, indeed, the source of Newton’s first significant musings over how gravity works.
There are many different places which claim to be the home of the apple tree that inspired Newton’s theory, but the most likely one—given the accounts—is located at his family home of Woolsthorpe Manor near Grantham, UK.
And, yes, there is an apple tree there today that is thought to be the apple tree in question, though it has re-rooted in the interim after being knocked over in a storm in 1890. Now around 400 years old, the tree and the property are protected by the National Trust.
If you’re curious, the tree is a Flower of Kent, which doesn’t produce very good apples for eating by today’s standards, though they are considered good cooking apples. Further, the apples in question are green, not red as is often depicted in Isaac Newton/apple images.
You’ll note, of course, that Stukeley above stated there was more than one apple tree there at the time; so whether this remaining one is “the” apple tree is a question can’t be definitively answered until someone invents a machine that can take us back in time to observe the event. That being said, Dr Richard Keesing from the Department of Physics at the University of York makes a pretty good case for why it probably is the correct tree .
Despite this uncertainty, there are a many trees that have been started as grafts from the Woolsthorpe tree, including one at Trinity College in Cambridge which sits beneath the window of the room Newton used when studying there.
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- Astronomer Alexis Clairaut in 1727 commented on Hooke’s accusations that Newton stole Hooke’s work, summing up the situation nicely: “One must not think that this idea … of Hooke diminishes Newton’s glory… the example of Hooke [serves] to show what a distance there is between a truth that is glimpsed and a truth that is demonstrated.” Essentially, Hooke guessed at a notion that Newton was able to prove.
- Newton himself never chose to make an official guess at what actually was the underlying mechanism of gravity. In fact, while he noted “It is enough that gravity does really exist and acts according to the laws I have explained, and that it abundantly serves to account for all the motions of celestial bodies,” he also stated “That one body may act upon another at a distance through a vacuum without the mediation of anything else, by and through which their action and force may be conveyed from one another, is to me so great an absurdity that, I believe, no man who has in philosophic matters a competent faculty of thinking could ever fall into it.”
- Besides the above references to who Newton told the “apple tree” story to, two others also gave an account of him telling the story to them: Catherine Barton (his niece) and Christopher Dawson (a student at Cambridge).
- It isn’t clear whether Voltaire heard the “apple” story from Newton himself or if he was told it by a mutual friend or found out about it in some other manner. That said, the pair were friends or at least acquaintances, depending on your definition of “friends”. Voltaire was even present at Newton’s funeral.
- In 1976, Apple Computers briefly used a logo that featured Sir Isaac Newton sitting beneath an apple tree. It was designed by Ronald Wayne, a lesser-known co-founder of the company. Apple later changed the logo to the more recognizable rainbow apple with the bite taken out of it.
- Newton has been commemorated in many different ways. Perhaps one of the larger monuments to his genius is a statue by Eduardo Paolozzi which stands near the British Library in London. The statue is based on an etching of Newton by William Blake.
- William Stukeley, Newton’s biographer, had quite the resume himself. In addition to being a doctor, he had a key interest in historical monuments and is perhaps best known for his excavation of Stonehenge. He was the first person to recognize the alignment of Stonehenge on solstices and attributed the iconic landmark to the druids. He later became a vicar, had a keen interest in Robin Hood, and wrote music for the flute.
- Newton was buried in Westminster Abbey. Not far down the nave, John Conduitt was also buried. According to an inscription, Conduitt “wished his remains to be placed opposite this spot, near to the ashes of the great Newton, to whom he was linked by ties of affinity.”
- Mercury was found in Newton’s hair when it was examined after his death, likely a result of his experiments in alchemy.
- Newton was the second scientist to be knighted, though it’s thought he was granted knighthood for political reasons rather than his achievements. He was knighted in April 1705, over 100 years after the first knighted scientist, Sir Francis Bacon, was given the honour in 1603.
- The value of “G” in Newton’s famous “universal gravity” equation wasn’t accurately determined until 71 years after Newton’s death and 111 years after he published the equation.
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Английский (топики / темы): Isaac Newton — Исаак Ньютон
Newton, one of the greatest scientists of all times was born in 1642 in the little village in Lincolnshire, England. His father was a farmer and died before Newton was born. His mother was a clever woman whom he always loved.
After the school, Newton studied mathematics at Cambridge university and received his degree in 1665. Then the university was closed because of the danger of plague and Newton went home for eighteen months. It was most important period in his life when he made his three great discoveries — the discoveries of the differential calculuses, of the nature of white light, and of the law of gravitation.
These discoveries are still important for the modern science. Newton had always been interested in the problems of light. Many people saw colours of a rainbow but only Newton showed, by his experiments, that white light consists of these colours.
It is interesting how he discovered the law gravitation. Once, as he sat at the garden, his attention was drawn by the fall of an apple. Many people saw such an usual thing before.
But it was Newton who asked himself a question: «Why does that apple fall perpendicularly to the ground? Why doesn’t it go sidewards or upwards?» The answer to this question was the theory of gravitation, discovered by Newton.
Newton died at the age of 84, and was buried in Westminster Abbey, where his monument stands today.
Ньютон, один из величайших ученых всех времен, родился в 1642 году в маленькой деревеньке в графстве, Линкольншир в Англии. Его отец был фермером и умер, прежде чем родился Ньютон. Его мать была умной женщиной, которую он всегда любил.
После школы Ньютон изучал математику в Кембриджском университете и в 1665 году получил ученую степень. Затем университет закрылся из-за угрозы чумы, и Ньютон уехал домой на полтора года. Это был самый важный период в его жизни, когда он сделал три великих открытия — открытие дифференциального исчисления, природы белого света и закона всемирного тяготения.
Эти открытия все еще важны для современной науки. Ньютон всегда интересовался проблемами света. Многие видели цвета радуги, но только Ньютон в результате своих экспериментов доказал, что белый свет состоит из этих цветов.
Любопытно то, как он открыл закон всемирного тяготения. Однажды, когда он сидел в саду, его внимание привлекло падение яблока. Многие люди видели это обыкновенное явление прежде.
Но именно Ньютон спросил себя: «Почему яблоко падает перпендикулярно земле? Почему оно не летит в сторону или вверх?» Ответом на этот вопрос стала теория гравитации.
Ньютон умер в возрасте 84 лет и был похоронен в Вестминстерском аббатстве, где и находится сейчас памятник в его честь.
1. When and where was Newton born?
2. Where did he study?
3. What three major discoveries did Newton make?
4. When did Newton make these discoveries?
5. How did the idea which led to the discovery of the law
of gravitation first come to him?
6. When did Newton die and where is he buried?
degree — ученая степень
plague — чума
discovery — открытие
differential calculuses — дифференциальное исчисление
law of gravitation — закон всемирного тяготения
rainbow — радуга
to draw — привлекать
perpendicularly — перпендикулярно
sidewards — в сторону
upwards — вверх
abbey — аббатство
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