IMDb > The Uncertainty Principle (2002)

The Uncertainty Principle (2002) More at IMDbPro »O Princípio da Incerteza (original title)

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Release Date:
30 August 2002 (Italy) See more »
Having lost her place among the social elite, a widow remarries and starts a family. | Add synopsis »
1 nomination See more »
User Reviews:
Quantum cinema See more (4 total) »


  (in credits order)
Leonor Baldaque ... Camila
Leonor Silveira ... Vanessa
Isabel Ruth ... Celsa
Ricardo Trêpa ... José Feliciano, 'Touro Azul' / Fiscal

Ivo Canelas ... António Clara
Luís Miguel Cintra ... Daniel Roper
José Manuel Mendes ... Torcato Roper
Carmen Santos ... Joana
Cecília Guimarães ... Rute
Júlia Buisel ... Aunt Tofi
Ângela Marques ... Adoração
Diogo Dória ... Policeman
António Fonseca ... Policeman
João Bénard da Costa ... Mr. Ferreira (as Duarte de Almeida)
P. João Marques ... Priest
António Costa ... Tiago
David Cardoso ... Overman
rest of cast listed alphabetically:
António Reis
Adelaide Teixeira ... Mãe
Joana Loureiro ... Lady (uncredited)

Directed by
Manoel de Oliveira 
Writing credits
Agustina Bessa-Luís (novel "Jóia de Família")

Manoel de Oliveira 

Jacques Parsi (collaboration) and
Júlia Buisel (collaboration) and
António Costa (collaboration)

Produced by
Paulo Branco .... producer
Cinematography by
Renato Berta 
Film Editing by
Manoel de Oliveira 
Catherine Krassovsky 
Production Design by
Zé Branco 
Costume Design by
Isabel Branco 
Makeup Department
Aracelli Fuente .... key makeup artist
Philippe Mangin .... key hair stylist
Production Management
Joaquim Carvalho .... production manager
Second Unit Director or Assistant Director
Nuno Milagre .... second assistant director
José Maria Vaz da Silva .... first assistant director
Art Department
João Paulo Santos .... props
Sound Department
Jean-François Auger .... sound editor
Jean-François Auger .... sound mixer
Henri Maïkoff .... sound
Camera and Electrical Department
Manuel Ramos .... key grip
Music Department
Shlomo Mintz .... musician
Other crew
Júlia Buisel .... script supervisor
Joana Ferreira .... unit manager
Renata Sancho .... continuity

Production CompaniesDistributorsOther Companies

Additional Details

Also Known As:
"O Princípio da Incerteza" - France (original title)
See more »
133 min (Cannes Film Festival)
Aspect Ratio:
1.66 : 1 See more »
Sound Mix:

Did You Know?

Two of the leads of the movie are grandchildren of the director/co-writer and the novelist whose book inspired the movie. Leonor Baldaque is the granddaughter of novelist Agustina Bessa-Luís, while Ricardo Trêpa is of Manoel de Oliveira.See more »
Movie Connections:
Followed by Magic Mirror (2005)See more »
24 caprici per violino, op. 1See more »


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5 out of 5 people found the following review useful.
Quantum cinema, 11 December 2008
Author: daniel_cms

O Principio da Incerteza is a film that, probably, most people will not understand, nor appreciate. It is no more and no less then art, and, thus, it is no more, and no less, then life. To achieve a proper explanation of what this film is, or of what it is about, it would be necessary to understand the nature of cinema itself as form of art.

The plot is quite interesting, as it is also the idea contained by the film. In fact, in the beginning of the story we are given what seem to be very marked and strongly defined characters. For instance it is immediately noticeable the attempt to associate some characters with their contrasting personas – represented in the opposition between the two women, between the two men and between the housekeeper and the Mother of the family.

As the film progresses the behaviour of the characters seems to evolve, and at least apparently, in a contradictory manner. So, not only the "manichean" view of the characters that we are presented with in the beginning of the film is discarded later on, but also the personalities of the characters appears to suffer from some form of mutation that leads them closer to what was their opposite. With one exception though: Camile, the main character, and the only true archetype. Only one catch: such archetype is constructed from within that persona, which, naturally, not only makes it impossible for the other characters in the film to understand her, but it also implies that solely by intuition, and not by a classical logic construction, we can catch a glimpse of her nature.

"O Principio da Incerteza", or "the uncertainty principle" is actually a cinematic representation of Werner Heisenberg's quantum physic's principle: The more precisely the position is determined, the less precisely the momentum is known.

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