
English: 
Are we starting now? OK!
We are going to illustrate what Foucault did in 1851
in Panthéon, Paris.
We have replaced the church floor with a globe.
Yes, he hung a 29 kg heavy cannonball
in a huge steel wire.
Foucault wanted to show that the pendulum
continued in the same plane,
while the Earth, of course, is rotating.
It was his way of proving that the Earth is rotating.
Shall I drop it?
The Earth is rotating.
You can notice that the pendulum plane is the same,
If the pendulum swings above the North Pole or the South Pole,
it will reach its point of origin in 24 hours.
Precisely!

Norwegian: 
Begynner vi nå? OK!
Nå skal vi vise hva Foucault gjorde i 1851
i Panthéon i Paris.
Vi har erstattet kirkegulvet med en globus.
Ja, han hang opp en kanonkule på 28 kilo
i en enorm stålwire.
Han ville vise at pendelen
fortsatte i samme plan,
mens jorden, selvfølgelig, roterer.
Det var for å bevise at jorden roterer.
Skal jeg slippe?
Så roterer jorden.
Da ser du at pendelplanet er det samme,
Så dersom pendelen pendler over Nordpolen eller Sørpolen,
vil pendelen komme fram til utgangspunktet på ett døgn.
Riktig!

Norwegian: 
 
 

English: 
 
 
