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Interference

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Watch the movie in these languages :

Interference, two sounds produce now and then silence

Two sounds produce places of quietness that you must search for

waterwaves also produce places of little disturbance.

Interference

http://www.walter-fendt.de/ph14e/interference.htm

Who

This film has been created by
Hans van Dijk and Johan 't Hart.
Footage was made by www.oblique.nl
The film's actor was Lodewijk
Portielje.
What

What is it we want to show?

walter Fendt's website inspired us
to show practical applications of
physical phenomena.
This film could be the first of a
series of films about practical
applications, based on Walter
Fendt's Java applets.
How

How is it possible that the
Tacoma Narrows Bridge collapsed
because of a strong wind?
Every bridge has a resonance
frequency. When the wind is
strong enough, the bridge might
be starting moving.

RESONANCE OF A BRIDGE (2)

http://www.youtube.com/watch?v=j-zczJXSxnw

How is it possible that an
earthquake can start a bridge
vibrating?
The low frequency of an
earthquake can start a bridge
vibrating.

RESONANCE OF A BRIDGE (1)

http://www.youtube.com/watch?v=t9kR9T9wZsM
Where

The film has been made in the
Pieter Nieuwland College's gym.
Why

Why did we make this film?

This film has been made because
of Walter Fendt's Java applet:
http://www.walter-fendt.de/ph14nl



In this film we show some examples
concerning interference.
Why is the film's comment in five
languages?
We want to show the power of a
Racupation film.
When

This film has been made in
spring 2009.