The Complex Geometry of Islamic Art & Design: A Short Introduction

When you think of the accom­plish­ments of the Islam­ic world, what comes to mind? For most of this cen­tu­ry so far, at least in the West, the very notion has had asso­ci­a­tions in many minds with not cre­ation but destruc­tion. In 2002, math­e­mati­cian Kei­th Devlin lament­ed how “the word Islam con­jures up images of fanat­i­cal ter­ror­ists fly­ing jet air­planes full of peo­ple into build­ings full of even more peo­ple” and “the word Bagh­dad brings to mind the unscrupu­lous and decid­ed­ly evil dic­ta­tor Sad­dam Hus­sein.” Iron­i­cal­ly, writes Devlin, “the cul­ture that these fanat­ics claim to rep­re­sent when they set about try­ing to destroy the mod­ern world of sci­ence and tech­nol­o­gy was in fact the cra­dle in which that tra­di­tion was nur­tured. As math­e­mati­cians, we are all chil­dren of Islam.”

You don’t have to dig deep into his­to­ry to dis­cov­er the con­nec­tion between Islam and math­e­mat­ics; you can sim­ply see it. “In Islam­ic cul­ture, geom­e­try is every­where,” says the nar­ra­tor of the brief TED-Ed les­son above. “You can find it in mosques, madrasas, palaces, and pri­vate homes.”

Script­ed by writer and con­sul­tant on Islam­ic design Eric Broug, the video breaks down the com­plex, abstract geo­met­ric pat­terns found every­where in Islam­ic art and design, from its “intri­cate flo­ral motifs adorn­ing car­pets and tex­tiles to pat­terns of tile­work that seem to repeat infi­nite­ly, inspir­ing won­der and con­tem­pla­tion of eter­nal order.”

And the tools used to ren­der these visions of eter­ni­ty? Noth­ing more advanced than a com­pass and a ruler, Broug explains, used to first draw a cir­cle, divide that cir­cle up, draw lines to con­struct repeat­ing shapes like petals or stars, and keep intact the grid under­ly­ing the whole pat­tern. The process of repeat­ing a geo­met­ric pat­tern on a grid, called tes­sel­la­tion, may seen famil­iar indeed to fans of the math­e­mat­i­cal­ly mind­ed artist M.C. Esch­er, who used the very same process to demon­strate what won­drous artis­tic results can emerge from the use of sim­ple basic pat­terns. In fact, Escher’s Dutch coun­try­man Broug once wrote an essay on the con­nec­tions between his art and that of the Islam­ic world for the exhib­it Esch­er Meets Islam­ic Art at Ams­ter­dam’s Tropen­mu­seum.

Esch­er first encoun­tered tes­sel­la­tions on a trip to the Islam­ic world him­self, in the “col­or­ful abstract dec­o­ra­tions in the 14th cen­tu­ry Alham­bra, the well-known palace and fortress com­plex in South­ern Spain,” writes Al.Arte’s Aya Johan­na Daniëlle Dürst Britt. “Although he vis­it­ed the Alham­bra in 1922 after his grad­u­a­tion as a graph­ic artist, he was already inter­est­ed in geom­e­try, sym­me­try and tes­sel­la­tions for some years.” His fas­ci­na­tions includ­ed “the effect of col­or on the visu­al per­spec­tive, caus­ing some motifs to seem infi­nite — an effect part­ly caused by sym­me­try.” His sec­ond vis­it to Alham­bra, in 1936, solid­i­fied his under­stand­ing of the prin­ci­ples of tes­sel­la­tion, and he would go on to base about a hun­dred of his own pieces on the pat­terns he saw there. Those who seek the door to infin­i­ty under­stand that any tra­di­tion may hold the keys.

Relat­ed Con­tent:

How Ara­bic Trans­la­tors Helped Pre­serve Greek Phi­los­o­phy … and the Clas­si­cal Tra­di­tion

Learn Islam­ic & Indi­an Phi­los­o­phy with 107 Episodes of the His­to­ry of Phi­los­o­phy With­out Any Gaps Pod­cast

Ancient Maps that Changed the World: See World Maps from Ancient Greece, Baby­lon, Rome, and the Islam­ic World

Watch M.C. Esch­er Make His Final Artis­tic Cre­ation in the 1971 Doc­u­men­tary Adven­tures in Per­cep­tion

Based in Seoul, Col­in Mar­shall writes and broad­casts on cities and cul­ture. He’s at work on the book The State­less City: a Walk through 21st-Cen­tu­ry Los Ange­les, the video series The City in Cin­e­ma, the crowd­fund­ed jour­nal­ism project Where Is the City of the Future?, and the Los Ange­les Review of Books’ Korea Blog. Fol­low him on Twit­ter at @colinmarshall or on Face­book.

Trigonometry Discovered on a 3700-Year-Old Ancient Babylonian Tablet

One pre­sump­tion of tele­vi­sion shows like Ancient Aliens and books like Char­i­ots of the Gods is that ancient people—particularly non-west­ern people—couldn’t pos­si­bly have con­struct­ed the elab­o­rate infra­struc­ture and mon­u­men­tal archi­tec­ture and stat­u­ary they did with­out the help of extra-ter­res­tri­als. The idea is intrigu­ing, giv­ing us the huge­ly ambi­tious sci-fi fan­tasies woven into Rid­ley Scott’s revived Alien fran­chise. It is also insult­ing in its lev­el of dis­be­lief about the capa­bil­i­ties of ancient Egyp­tians, Mesopotami­ans, South Amer­i­cans, South Sea Islanders, etc.

We assume the Greeks per­fect­ed geom­e­try, for exam­ple, and refer to the Pythagore­an the­o­rem, although this prin­ci­ple was prob­a­bly well-known to ancient Indi­ans. Since at least the 1940s, math­e­mati­cians have also known that the “Pythagore­an triples”—inte­ger solu­tions to the theorem—appeared 1000 years before Pythago­ras on a Baby­lon­ian tablet called Plimp­ton 322. Dat­ing back to some­time between 1822 and 1762 B.C. and dis­cov­ered in south­ern Iraq in the ear­ly 1900s, the tablet has recent­ly been re-exam­ined by math­e­mati­cians Daniel Mans­field and Nor­man Wild­berg­er of Australia’s Uni­ver­si­ty of New South Wales and found to con­tain even more ancient math­e­mat­i­cal wis­dom, “a trigono­met­ric table, which is 3,000 years ahead of its time.”

In a paper pub­lished in His­to­ria Math­e­mat­i­ca the two con­clude that Plimp­ton 322’s Baby­lon­ian cre­ators detailed a “nov­el kind of trigonom­e­try,” 1000 years before Pythago­ras and Greek astronomer Hip­parchus, who has typ­i­cal­ly received cred­it for trigonometry’s dis­cov­ery. In the video above, Mans­field intro­duces the unique prop­er­ties of this “sci­en­tif­ic mar­vel of the ancient world,” an enig­ma that has “puz­zled math­e­mati­cians,” he writes in his arti­cle, “for more than 70 years.” Mans­field is con­fi­dent that his research will fun­da­men­tal­ly change the way we under­stand sci­en­tif­ic his­to­ry. He may be over­ly opti­mistic about the cul­tur­al forces that shape his­tor­i­cal nar­ra­tives, and he is not with­out his schol­ar­ly crit­ics either.

Eleanor Rob­son, an expert on Mesopotamia at Uni­ver­si­ty Col­lege Lon­don has not pub­lished a for­mal cri­tique, but she did take to Twit­ter to reg­is­ter her dis­sent, writ­ing, “for any his­tor­i­cal doc­u­ment, you need to be able to read the lan­guage & know the his­tor­i­cal con­text to make sense of it. Maths is no excep­tion.” The trigonom­e­try hypoth­e­sis, she writes in a fol­low-up tweet, is “tedious­ly wrong.” Mans­field and Wild­berg­er may not be experts in ancient Mesopotami­an lan­guage and cul­ture, it’s true, but Rob­son is also not a math­e­mati­cian. “The strongest argu­ment” in the Aus­tralian researchers’ favor, writes Ken­neth Chang at The New York Times, is that “the table works for trigo­nom­ic cal­cu­la­tions.” As Mans­field says, “you don’t make a trigo­nom­ic table by acci­dent.”

Plimp­ton 322 uses ratios rather than angles and cir­cles. “But when you arrange it such a way so that you can use any known ratio of a tri­an­gle to find the oth­er side of a tri­an­gle,” says Mans­field, “then it becomes trigonom­e­try. That’s what we can use this frag­ment for.” As for what the ancient Baby­lo­ni­ans used it for, we can only spec­u­late. Rob­son and oth­ers have pro­posed that the tablet was a teach­ing guide. Mans­field believes “Plimp­ton 322 was a pow­er­ful tool that could have been used for sur­vey­ing fields or mak­ing archi­tec­tur­al cal­cu­la­tions to build palaces, tem­ples or step pyra­mids.”

What­ev­er its ancient use, Mans­field thinks the tablet “has great rel­e­vance for our mod­ern world… prac­ti­cal appli­ca­tions in sur­vey­ing, com­put­er graph­ics and edu­ca­tion.” Giv­en the pos­si­bil­i­ties, Plimp­ton 322 might serve as “a rare exam­ple of the ancient world teach­ing us some­thing new,” should we choose to learn it. That knowl­edge prob­a­bly did not orig­i­nate in out­er space.

Relat­ed Con­tent:

How the Ancient Greeks Shaped Mod­ern Math­e­mat­ics: A Short, Ani­mat­ed Intro­duc­tion

Ancient Maps that Changed the World: See World Maps from Ancient Greece, Baby­lon, Rome, and the Islam­ic World

Hear The Epic of Gil­gamesh Read in the Orig­i­nal Akka­di­an and Enjoy the Sounds of Mesopotamia

Josh Jones is a writer and musi­cian based in Durham, NC. Fol­low him at @jdmagness

Arnold Schoenberg Creates a Hand-Drawn, Paper-Cut “Wheel Chart” to Visualize His 12-Tone Technique

“These go up to eleven,” Spinal Tap famous­ly said of the ampli­fiers that, so they claimed, took them to a high­er lev­el in rock music. But the work of Aus­tri­an com­pos­er Arnold Schoen­berg, one of the best-known fig­ures in the his­to­ry of avant-garde music, went up to twelve — twelve tones, that is. His “twelve-tone tech­nique,” invent­ed in the ear­ly 1920s and for the next few decades used most­ly by he and his col­leagues in the Sec­ond Vien­nese School such as Alban Berg, Anton Webern, and Hanns Eisler, allowed com­posers to break free of the tra­di­tion­al West­ern sys­tem of keys that lim­it­ed the notes avail­able for use in a piece, instead grant­i­ng each note the same weight and mak­ing none of them cen­tral.

This does­n’t mean that com­posers using Schoen­berg’s twelve-tone tech­nique could just use notes at ran­dom in com­plete atonal­i­ty, but that a new set of con­sid­er­a­tions would orga­nize them. “He believed that a sin­gle tonal­i­ty could include all twelve notes of the chro­mat­ic scale,” writes Brad­ford Bai­ley at The Hum, “as long as they were prop­er­ly orga­nized to be sub­or­di­nate to ton­ic (the ton­ic is the pitch upon which all oth­ers are ref­er­enced, in oth­er words the root or axis around which a piece is built).” The math­e­mat­i­cal rig­or under­ly­ing it all required some expla­na­tion, and often math­e­mat­i­cal and musi­cal con­cepts — math­e­mat­ics and music being in any case inti­mate­ly con­nect­ed — become much clear­er when ren­dered visu­al­ly.

Hence Schoen­berg’s twelve-tone wheel chart pic­tured at the top of the post, one of what Arnold Schoen­berg’s Jour­ney author Allen Shawn describes as “no few­er than twen­ty-two dif­fer­ent kinds of con­trap­tions” — includ­ing “charts, cylin­ders, book­lets, slide rules” — “for trans­pos­ing and deriv­ing twelve-tone rows” need­ed to com­pose twelve-tone music. (See the slide ruler above too.) “The dis­tinc­tion between ‘play’ and ‘work’ is already hard to draw in the case of artists,” writes Shawn, “but in Schoen­berg’s case it is espe­cial­ly hard to make since he brought dis­ci­pline, orig­i­nal­i­ty, and play­ful­ness to many of his activ­i­ties.” These also includ­ed mak­ing spe­cial play­ing cards (two of whose sets you can see here and here) and even his own ver­sion of chess.

As Shawn describes it, Koali­tion­ss­cach, or “Coali­tion Chess,” involves “the armies of four coun­tries arrayed on the four sides of the board, for which he designed and con­struct­ed the pieces him­self.” Instead of an eight-by-eight board, Coali­tion Chess uses a ten-by-ten, and the pieces on it “rep­re­sent machine guns, artillery, air­planes, sub­marines, tanks, and oth­er instru­ments of war.” The rules, which “require that the four play­ers form alliances at the out­set,” add at least a dimen­sion to the age-old stan­dard game of chess — a form that, like tra­di­tion­al West­ern music, human­i­ty will still be strug­gling to mas­ter decades and even cen­turies hence. But appar­ent­ly, for a mind like Schoen­berg’s, chess and music as he knew them weren’t near­ly chal­leng­ing enough.

Relat­ed Con­tent:

Vi Hart Uses Her Video Mag­ic to Demys­ti­fy Stravin­sky and Schoenberg’s 12-Tone Com­po­si­tions

The Avant-Garde Project: An Archive of Music by 200 Cut­ting-Edge Com­posers, Includ­ing Stravin­sky, Schoen­berg, Cage & More

Inter­views with Schoen­berg and Bartók

John Coltrane Draws a Pic­ture Illus­trat­ing the Math­e­mat­ics of Music

Based in Seoul, Col­in Mar­shall writes and broad­casts on cities and cul­ture. He’s at work on the book The State­less City: a Walk through 21st-Cen­tu­ry Los Ange­les, the video series The City in Cin­e­ma, the crowd­fund­ed jour­nal­ism project Where Is the City of the Future?, and the Los Ange­les Review of Books’ Korea Blog. Fol­low him on Twit­ter at @colinmarshall or on Face­book.

John Coltrane Draws a Picture Illustrating the Mathematics of Music

Physi­cist and sax­o­phon­ist Stephon Alexan­der has argued in his many pub­lic lec­tures and his book The Jazz of Physics that Albert Ein­stein and John Coltrane had quite a lot in com­mon. Alexan­der in par­tic­u­lar draws our atten­tion to the so-called “Coltrane cir­cle,” which resem­bles what any musi­cian will rec­og­nize as the “Cir­cle of Fifths,” but incor­po­rates Coltrane’s own inno­va­tions. Coltrane gave the draw­ing to sax­o­phon­ist and pro­fes­sor Yusef Lateef in 1967, who includ­ed it in his sem­i­nal text, Repos­i­to­ry of Scales and Melod­ic Pat­terns. Where Lateef, as he writes in his auto­bi­og­ra­phy, sees Coltrane’s music as a “spir­i­tu­al jour­ney” that “embraced the con­cerns of a rich tra­di­tion of auto­phys­iopsy­chic music,” Alexan­der sees “the same geo­met­ric prin­ci­ple that moti­vat­ed Einstein’s” quan­tum the­o­ry.

Nei­ther descrip­tion seems out of place. Musi­cian and blog­ger Roel Hol­lan­der notes, “Thelo­nious Monk once said ‘All musi­cans are sub­con­scious­ly math­e­mati­cians.’ Musi­cians like John Coltrane though have been very much aware of the math­e­mat­ics of music and con­scious­ly applied it to his works.”

Coltrane was also very much aware of Einstein’s work and liked to talk about it fre­quent­ly. Musi­can David Amram remem­bers the Giant Steps genius telling him he “was try­ing to do some­thing like that in music.”

Hol­lan­der care­ful­ly dis­sects Coltrane’s math­e­mat­ics in two the­o­ry-heavy essays, one gen­er­al­ly on Coltrane’s “Music & Geom­e­try” and one specif­i­cal­ly on his “Tone Cir­cle.” Coltrane him­self had lit­tle to say pub­li­cal­ly about the inten­sive the­o­ret­i­cal work behind his most famous com­po­si­tions, prob­a­bly because he’d rather they speak for them­selves. He pre­ferred to express him­self philo­soph­i­cal­ly and mys­ti­cal­ly, draw­ing equal­ly on his fas­ci­na­tion with sci­ence and with spir­i­tu­al tra­di­tions of all kinds. Coltrane’s poet­ic way of speak­ing has left his musi­cal inter­preters with a wide vari­ety of ways to look at his Cir­cle, as jazz musi­cian Corey Mwam­ba dis­cov­ered when he infor­mal­ly polled sev­er­al oth­er play­ers on Face­book. Clar­inetist Arun Ghosh, for exam­ple, saw in Coltrane’s “math­e­mat­i­cal prin­ci­ples” a “musi­cal sys­tem that con­nect­ed with The Divine.” It’s a sys­tem, he opined, that “feels quite Islam­ic to me.”

Lateef agreed, and there may be few who under­stood Coltrane’s method bet­ter than he did. He stud­ied close­ly with Coltrane for years, and has been remem­bered since his death in 2013 as a peer and even a men­tor, espe­cial­ly in his ecu­meni­cal embrace of the­o­ry and music from around the world. Lateef even argued that Coltrane’s late-in-life mas­ter­piece A Love Supreme might have been titled “Allah Supreme” were it not for fear of “polit­i­cal back­lash.” Some may find the claim ten­den­tious, but what we see in the wide range of respons­es to Coltrane’s musi­cal the­o­ry, so well encap­su­lat­ed in the draw­ing above, is that his recog­ni­tion, as Lateef writes, of the “struc­tures of music” was as much for him about sci­en­tif­ic dis­cov­ery as it was reli­gious expe­ri­ence. Both for him were intu­itive process­es that “came into exis­tence,” writes Lateef, “in the mind of the musi­can through abstrac­tion from expe­ri­ence.”

If you would like to sign up for Open Culture’s free email newslet­ter, please find it here. It’s a great way to see our new posts, all bun­dled in one email, each day.

If you would like to sup­port the mis­sion of Open Cul­ture, con­sid­er mak­ing a dona­tion to our site. It’s hard to rely 100% on ads, and your con­tri­bu­tions will help us con­tin­ue pro­vid­ing the best free cul­tur­al and edu­ca­tion­al mate­ri­als to learn­ers every­where. You can con­tribute through Pay­Pal, Patre­on, and Ven­mo (@openculture). Thanks!

Relat­ed Con­tent:

The Secret Link Between Jazz and Physics: How Ein­stein & Coltrane Shared Impro­vi­sa­tion and Intu­ition in Com­mon

John Coltrane’s Hand­writ­ten Out­line for His Mas­ter­piece A Love Supreme

John Coltrane’s ‘Giant Steps’ Ani­mat­ed

Josh Jones is a writer and musi­cian based in Durham, NC. Fol­low him at @jdmagness

Behold the Ingenious “Ambiguous Cylinder Illusion” (and Then Find Out How It Works)

Cre­at­ed by Kokichi Sug­i­hara, a math pro­fes­sor at Mei­ji Uni­ver­si­ty in Tokyo, the “Ambigu­ous Cylin­der Illu­sion” wowed audi­ences at “the Best Illu­sion of the Year Con­test” in 2016. Here’s the gen­er­al gist of the illu­sion:

The direct views of the objects and their mir­ror images gen­er­ate quite dif­fer­ent inter­pre­ta­tions of the 3D shapes. They look like ver­ti­cal cylin­ders, but their sec­tions appear to be dif­fer­ent; in one view they appear to be rec­tan­gles, while in the oth­er view they appear to be cir­cles. We can­not cor­rect our inter­pre­ta­tions although we log­i­cal­ly know that they come from the same objects. Even if the object is rotat­ed in front of a view­er, it is dif­fi­cult to under­stand the true shape of the object, and thus the illu­sion does not dis­ap­pear.

So how do those rec­tan­gles look like cir­cles, and vice-ver­sa? The video below–if you care to spoil the illusion–will show you. Find more videos from the Illu­sion Con­test here.

via The Kids Should See This

If you would like to sign up for Open Culture’s free email newslet­ter, please find it here. It’s a great way to see our new posts, all bun­dled in one email, each day.

If you would like to sup­port the mis­sion of Open Cul­ture, con­sid­er mak­ing a dona­tion to our site. It’s hard to rely 100% on ads, and your con­tri­bu­tions will help us con­tin­ue pro­vid­ing the best free cul­tur­al and edu­ca­tion­al mate­ri­als to learn­ers every­where. You can con­tribute through Pay­Pal, Patre­on, and Ven­mo (@openculture). Thanks!

How Did Beethoven Compose His 9th Symphony After He Went Completely Deaf?

You don’t need to know any­thing at all about clas­si­cal music, nor have any lik­ing for it even, to be deeply moved by that most famous of sym­phonies, Lud­wig van Beethoven’s 9th—“per­haps the most icon­ic work of the West­ern musi­cal tra­di­tion,” writes The Juil­liard Jour­nal in an arti­cle about its hand­writ­ten score. Com­mis­sioned in 1817, the sub­lime work was only com­plet­ed in 1824. By that time, its com­pos­er was com­plete­ly and total­ly deaf. At the first per­for­mance, Beethoven did not notice that the mas­sive final choral move­ment had end­ed, and one of the musi­cians had to turn him around to acknowl­edge the audi­ence.

This may seem, says researcher Natalya St. Clair in the TED-Ed video above, like some “cru­el joke,” but it’s the truth. Beethoven was so deaf that some of the most inter­est­ing arti­facts he left behind are the so-called “con­ver­sa­tion books,” kept from 1818 onward to com­mu­ni­cate with vis­i­tors who had to write down their ques­tions and replies. How then might it have been pos­si­ble for the com­pos­er to cre­ate such endur­ing­ly thrilling, rap­tur­ous works of aur­al art?

Using the del­i­cate, melan­choly “Moon­light Sonata” (which the com­pos­er wrote in 1801, when he could still hear), St. Clair attempts to show us how Beethoven used math­e­mat­i­cal “pat­terns hid­den beneath the beau­ti­ful sounds.” (In the short video below from doc­u­men­tary The Genius of Beethoven, see the onset of Beethoven’s hear­ing loss in a dra­mat­ic read­ing of his let­ters.) Accord­ing to St. Clair’s the­o­ry, Beethoven com­posed by observ­ing “the math­e­mat­i­cal rela­tion­ship between the pitch fre­quen­cy of dif­fer­ent notes,” though he did not write his sym­phonies in cal­cu­lus. It’s left rather unclear how the com­poser’s sup­posed intu­ition of math­e­mat­ics and pitch cor­re­sponds with his abil­i­ty to express such a range of emo­tions through music.

We can learn more about Beethoven’s deaf­ness and its bio­log­i­cal rela­tion­ship to his com­po­si­tion­al style in the short video below with research fel­low Edoar­do Sac­cen­ti and his col­league Age Smilde from the Biosys­tems Data Analy­sis Group at Amsterdam’s Swammer­dam Insti­tute for Life Sci­ences. By count­ing the high and low fre­quen­cies in Beethoven’s com­plete string quar­tets, a task that took Sac­cen­ti many weeks, he and his team were able to show how three dis­tinct com­po­si­tion­al styles “cor­re­spond to stages in the pro­gres­sion of his deaf­ness,” as they write in their paper (which you can down­load in PDF here).

The pro­gres­sion is unusu­al. As his con­di­tion wors­ened, Beethoven includ­ed few­er and few­er high fre­quen­cy sounds in his com­po­si­tions (giv­ing cel­lists much more to do). By the time we get to 1824–26, “the years of the late string quar­tets and of com­plete deafness”—and of the com­ple­tion of the 9th—the high notes have returned, due in part, Smilde says, to “the bal­ance between an audi­to­ry feed­back and the inner ear.” Beethoven’s reliance on his “inner ear” made his music “much and much rich­er.” How? As one vio­lin­ist in the clip puts it, he was “giv­en more free­dom because he was not attached any­more to the phys­i­cal sound, [he could] just use his imag­i­na­tion.”

For all of the com­pelling evi­dence pre­sent­ed here, whether Beethoven’s genius in his painful lat­er years is attrib­ut­able to his intu­ition of com­plex math­e­mat­i­cal pat­terns or to the total free rein of his imag­i­na­tive inner ear may in fact be undis­cov­er­able. In any case, no amount of ratio­nal expla­na­tion can explain away our aston­ish­ment that the man who wrote the unfail­ing­ly pow­er­ful, awe­some­ly dynam­ic “Ode to Joy” finale (con­duct­ed above by Leonard Bern­stein), couldn’t actu­al­ly hear any of the music.

Relat­ed Con­tent:

Stream the Com­plete Works of Bach & Beethoven: 250 Free Hours of Music

Slavoj Žižek Exam­ines the Per­verse Ide­ol­o­gy of Beethoven’s Ode to Joy

Beethoven’s Ode to Joy Played With 167 Theremins Placed Inside Matryosh­ka Dolls in Japan

Leonard Bern­stein Con­ducts Beethoven’s 9th in a Clas­sic 1979 Per­for­mance

Josh Jones is a writer and musi­cian based in Durham, NC. Fol­low him at @jdmagness

Sesame Street’s Count Von Count counts Pi to 10,000 Places: A 5 Hour Recording for Pi Day

March 14 is Pi Day. This odd­i­ty will keep the cel­e­bra­tion going a good part of the day.

If you would like to sign up for Open Culture’s free email newslet­ter, please find it here. It’s a great way to see our new posts, all bun­dled in one email, each day.

If you would like to sup­port the mis­sion of Open Cul­ture, con­sid­er mak­ing a dona­tion to our site. It’s hard to rely 100% on ads, and your con­tri­bu­tions will help us con­tin­ue pro­vid­ing the best free cul­tur­al and edu­ca­tion­al mate­ri­als to learn­ers every­where. You can con­tribute through Pay­Pal, Patre­on, and Ven­mo (@openculture). Thanks!

Relat­ed Con­tent

Pi in the Sky: The World’s Largest Ephemer­al Art Instal­la­tion over Beau­ti­ful San Fran­cis­co

How Pi Was Near­ly Changed to 3.2 … and Copy­right­ed!

1000 Dig­its of Pi, Recit­ed by Jane Barbe, Famous Voice of Tele­phone Com­pa­ny Record­ings

Infin­i­ty Minus Infin­i­ty Equals Pi: This Video Proves It

 

Watch 100 Randomly Ticking Metronomes Miraculously Achieve Synchronicity

It’s always sat­is­fy­ing to impose order on chaos, espe­cial­ly if it doesn’t involve bel­low­ing at a room­ful of jacked up teenagers.

Wit­ness the exper­i­ment above.

Mem­bers of Ikeguchi Lab­o­ra­to­ry, a Japan­ese orga­ni­za­tion ded­i­cat­ed to the analy­sis and pre­dic­tion of non­lin­ear phe­nom­e­na, placed 100 ran­dom­ly tick­ing metronomes on a hang­ing plat­form, curi­ous as to how long it would take them to syn­chro­nize.

(SPOILER ALERT! They start synch­ing up around the 1 minute, 20 sec­ond mark.)

How? Why? Is this some mys­ti­cal, musi­cal vari­ant of men­stru­al syn­chrony?

Nope. Physics is doing the heavy lift­ing here.

The key is that the plat­form hold­ing the metronomes is not fixed. It affects their move­ment by mov­ing in response to theirs.

To put it anoth­er way, KE = 0.5 • m • v2. Which is to say Kinet­ic Ener­gy = 0.5 • mass of object • (speed of object)2.

If you’re look­ing for anoth­er sci­en­tif­ic expla­na­tion, here’s how Giz­mo­do puts it: “the metronomes are trans­fer­ring ener­gy to the plat­form they’re on, which then trans­fers that ener­gy back to the metronomes—until they all sync up and start hit­ting the beat in one glo­ri­ous wave­length.”

By the two and a half minute mark, some view­ers will be rar­ing to delve into fur­ther study of ener­gy trans­fer­ence.

Oth­ers, their brains implod­ing, may elect to down­shift into a pure­ly audi­to­ry expe­ri­ence.

Close your eyes and lis­ten as the last hold outs fall into rhyth­mic step with the rest of the herd. A pleas­ant­ly har­mo­nious sound, not unlike that moment when a room­ful of jacked up teens sim­mers down, achiev­ing the sort of bliss­ful hive mind that’s a balm to teacher’s fraz­zled soul.

Crav­ing more?  Ikeguchi Lab­o­ra­to­ry also filmed their metronomes in tri­an­gu­lar, cir­cu­lar and X‑shaped for­ma­tions, avail­able for your view­ing plea­sure on the lab’s YouTube chan­nel.

via The Kid Should See This

Relat­ed Con­tent:

Watch What Hap­pens When 100 Metronomes Per­form Györ­gy Ligeti’s Con­tro­ver­sial Poème Sym­phonique

The Remark­able Physics of Ants: Watch Them Turn into Flu­ids and Solids at Will

The Mys­te­ri­ous Physics Behind How Bikes Ride by Them­selves

Ayun Hal­l­i­day is an author, illus­tra­tor, the­ater mak­er and Chief Pri­ma­tol­o­gist of the East Vil­lage Inky zine.  Her play Zam­boni Godot is open­ing in New York City in March 2017. Fol­low her @AyunHalliday

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