Foucault's Pendulum, Paris

[osclarkos]

some sweet info here

[KakHazhar]

Beautiful, I want to go there :)

[1polonium210]

It is, indeed, an amazing thing to watch.

[Franzzzfromholland]

You know, I sleep. But since I've seen this movie, I sleep well again ;)

[alwerner49]

Now you have seen the video..

Now read the book Foucault's Pendulum by Prof. Umberto Eco, and be spell bound for the rest of your life.

Greetings from Ramsgate, Kent, UK.

[TheCharon77]

when does it stop? Never ends? Nice power source ^^

[ericsandmeyer]

I can see the earth rotating and hear it breathing.

[Led2000]

Its funny, most reactions come from de US and Canada. I made the video with the people in mind who are not able to visit Paris each day. But if you can, go. In the basement they still keep de funeral wreaths of some guy's of 1789.

[jackkjack]

wow the exitement ,

btw what if i stop it in the middle.. will it go right n left on it self?

[SpasticatedCunt]

@jackkjack No

[ya2121]

so this thing moves because of the earth's movement? thats pretty cool.

[Plutoniummatt]

its slow cuz angular freq = sqrt(g/l) = smalll cuz l is biiig

[born2die636]

well , the string is 67m long as desinged by focault and , the ball moves a lil bit more to the left than to the right , and that is beacuse of the earth's rotation , depends where this apparutus is place , like in paris , it is 11 degress to the left...

[tampicokeed]

@born2die636 due to earths rotation, there is a "coriolis effect" (simply put it is the earth turning under anything in motion) In north hemi (where the earth moves fr W to E--counterclockwise) , a thing in motion turns RIGHT (not left), In case of pendulum in each motion (swing) it veers a small amount to RIGHT. Cannon shell fired lands farther to RIGHT the more north you go. Obviously the pend makes 1 whole turn (CLOCKWISE) in 24hrs on N POLE, and 24 hr/cos of latitude anyplane else.

[tampicokeed]

@born2die636 sorry i meant 24hr/sin latitude for anyplace else

[j1836]

It's amazing that this thing is actual proof of the earth rotation.

I imagined it to move slower, actually.

[philbelanger2]

@j1836 It not a proof, it is evidence that supports the theory of the earth's rotation.

[ymom11]

@j1836

How long it takes for the pendulum to move, no matter the weight of the pendulum or hard the pendulum is pushed, is determined by the length of the string or in this case cable. Essentially, if you quadruple the string length, the time it takes for the pendulum to swing doubles. The exact equation: T = 2(pi) sqrt(L/g) where T = time(seconds), sqrt is square route, L = length of cable(in meters), and g = force of gravity(on earth that is 9.8 meters/second^2)

[mindprism]

@j1836 {It's amazing that this thing is actual proof of the earth rotation.}

More significantly, it proves, to put it dramatically -- "there is a hook, a constant point, the center of the universe, on which everything else hangs -- the unmoved and unmovable"

See, it measures not only the earths rotation, but every movement we make relative to this fixed space. The universal coordinate.

[iokarus]

wow is this thing on the moon or sumthing, it moves sooooooooo slowly.

[BooxLove132]

the string is just reallllly long. look at the top of the frame, and try an imagine where the top is. it's probablly about 10 stories tall or something.

[SaturnProds]

why doesn't it ever stop swinging? or does it?

[ASDAfdsfvbr]

Surrounding the cable where it attaches to the ceiling is an electromagnet shaped like a donut, and on either side, near the top of the cable, are two iron collars. An electronic device senses when the pendulum reaches maximum amplitude, switching on the electromagnet, which causes the appropriate collar to give the cable a slight jolt. Because the jolt is delivered at the right moment, the resonance is perfect, and energy is restored to the pendulum.

[enochjames]

Great explanation. And whoever negatived Saturn's question is an idiot, science is about asking logical questions and we shouldn't be discouraging this. I thought it was a good question.

Thank you.

[NielsHille]

Helemaal goed!