The film contains elements of Zanussi's "intellectual biography", as well as documentary elements, e.g., appearances of philosopher Władysław Tatarkiewicz (cast as himself).
Special Mention, International Documentary Association Pare Lorentz Award, which recognizes films that demonstrates exemplary filmmaking while focusing on the appropriate use of the natural environment, justice for all and the illumination of pressing social problems.
On the other hand, in a diffused bright-field setup (see Fig. 2) the illumination of the film is provided through a translucent slab (diffuser), and each point of the film receives light from all the directions.
In the absence of scattering, the attenuance provided by the emulsion is independent of the collimation of the illumination; a dense point absorbs a big portion of light and a less dense point absorbs a smaller portion, irrespective of the directional characteristics of the incident light.
At Chicago's Columbian Exposition he witnessed Nikola Tesla's alternating current system running everything mechanical, not to mention the illumination of the entire exposition itself.