Film Definition and 346 Threads

A film, also called a movie, motion picture or moving picture, is a work of visual art used to simulate experiences that communicate ideas, stories, perceptions, feelings, beauty, or atmosphere through the use of moving images. These images are generally accompanied by sound, and more rarely, other sensory stimulations. The word "cinema", short for cinematography, is often used to refer to filmmaking and the film industry, and to the art form that is the result of it.
The moving images of a film are created by photographing actual scenes with a motion-picture camera, by photographing drawings or miniature models using traditional animation techniques, by means of CGI and computer animation, or by a combination of some or all of these techniques, and other visual effects.
Traditionally, films were recorded onto celluloid film stock through a photochemical process and then shown through a movie projector onto a large screen. Contemporary films are often fully digital through the entire process of production, distribution, and exhibition, while films recorded in a photochemical form traditionally included an analogous optical soundtrack (a graphic recording of the spoken words, music and other sounds that accompany the images which runs along a portion of the film exclusively reserved for it, and is not projected).
Films are cultural artifacts created by specific cultures. They reflect those cultures, and, in turn, affect them. Film is considered to be an important art form, a source of popular entertainment, and a powerful medium for educating—or indoctrinating—citizens. The visual basis of film gives it a universal power of communication. Some films have become popular worldwide attractions through the use of dubbing or subtitles to translate the dialog into other languages.
The individual images that make up a film are called frames. In the projection of traditional celluloid films, a rotating shutter causes intervals of darkness as each frame, in turn, is moved into position to be projected, but the viewer does not notice the interruptions because of an effect known as persistence of vision, whereby the eye retains a visual image for a fraction of a second after its source disappears. The perception of motion is partly due to a psychological effect called the phi phenomenon.
The name "film" originates from the fact that photographic film (also called film stock) has historically been the medium for recording and displaying motion pictures. Many other terms exist for an individual motion-picture, including picture, picture show, moving picture, photoplay, and flick. The most common term in the United States is movie, while in Europe film is preferred. Common terms for the field in general include the big screen, the silver screen, the movies, and cinema; the last of these is commonly used, as an overarching term, in scholarly texts and critical essays. In early years, the word sheet was sometimes used instead of screen. 'Film' in general is not a good term to refer to a long standard commercial video production since it’s ambiguous in general and therefore requires context for correct interpretation.

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  1. T

    Thin Film Interference (Interferometer)

    Homework Statement One of the beams of an interferometer passes through a small glass container containing a cavity 1.30 cm deep. When a gas is allowed to slowly fill thr container, a total of 236 dark fringes are counted to move past a reference line. The light used has a wavelength of 610...
  2. J

    What's your favorite science film and why?

    Obviously Jurassic Park wins hands-down, so we exclude that one :-p What's the best science film out there? And what science does it represent? I quite like Good Will Hunting - probably more cos it's a good film than to do with the maths tho'
  3. F

    MgF2 Thin Film Reflection: Visible Intensification?

    Homework Statement A thin 1.00x10^-5 cm-thick film of MgF2 (n=1.38) is used to coat a camera lens. Are there any wavelengths in visible spectrum intensified in reflected light? Homework Equations thickness = wavelength/4n (n is refraction index) ? The Attempt at a Solution I am...
  4. M

    News Spike Lee Film of New Orleans Disaster: Will We See it in Elections?

    On Monday evening, August 22, HBO aired Parts 1 and 2 of a powerful new Spike Lee film (documentary) entitled, "When the Levees Came Down," covering the hurricane Katrina disaster in New Orleans. At its conclusion, I couldn't help but think that portions of this film, with DEAD BODIES littered...
  5. T

    Question on Thin Film Interference

    Hi - I'm having trouble with the following problem: A mixture of yellow light (wavelength = 574 nm in vacuum) and violet light (wavelength = 418 nm in vacuum) falls perpendicularly on a film of gasoline that is floating on a puddle of water. For both wavelengths, the refractive index of...
  6. J

    Can you reverse transform a thin film diffraction pattern?

    Thank you for your insights on this. Suppose our kitchen table has a double glass top. Here and there it produces Newton's rings type interference patterns. I understand that by reverse transforming an interference pattern you can recover an image. If I were to somehow do this...
  7. J

    How Are Dark Fringes Calculated in Newton's Rings Experiment?

    Newton's rings are observed in monochromatic light reflected from the air gap between a convex spherical piece of glass (radius of curvature R) and a plane slap of glass. The two pieces are in contact in the centre. (b) Show that the dark fringes have radii given approximately by r=...
  8. W

    Destructive Interference in Thin Film Interference

    Two oblong pieces of plane glass are separated from each other by a thin sheet of cellophane and held together with rubber bands, as shown in figure(I provided a website for the figure below), where the amount of separation is much exaggerated. If you place a "sodium vapor lam" vertically above...
  9. Hootenanny

    Did The Da Vinci Code Film Stay True to the Book?

    I went to see the Da Vinci code movie on friday. I would quite wary as the critical reviews were not all that good. However, in my opinion it turned out to be a very good film; I was impressed how much the film actually stuck to the book (although there were a few deviations). I was...
  10. siddharth

    Election Tactics: Freebies & Film Stars in Tamil Nadu

    It's election time in my state and there's a lot of funny stuff going on. After observing the political parties campaigning, I've come up with the two main tactics used to win an election. (Before that, here's a bit of background on the two major political parties. The two prominent political...
  11. Z

    Where to Buy a 9m Wide Three Layer Blown Film Coextrusion Line?

    please i want to comapnies' sites for buying three layer blown fim coextrusion line that ia able to produce films with widths about 9m
  12. Z

    Blown Film Coextrusion Die: 3-5 Layer Components

    what are the components of blown film coextrusion die (three to five layers)
  13. G

    Interference question, thin film

    Here is the question I have from the textbook and what I have done so far. A Thin film of oil ( n=1.25) is located on a smooth wet pavement. When viewed perpendicular to the pavement, the film reflects most strongly red light at 640nm and reflect no blue light at 512nm. How thick is the oil...
  14. C

    X-ray fluorescent screens and film contrast

    It's common practice in radiography, especially medical radiography where radiation doses are relevant, to use a fluorescent screen to expose photographic film, rather than rely on the effect of x-rays on the film itself. I understand the concept of fluorescence and the overall photon...
  15. K

    How Far Does a Car Travel After Driving Off a Cliff?

    In a film stunt, a car is driven off a cliff with a horizontal velocity of 12.9 ms-1. The cliff face is vertical, and the cliff is 20.7 m high. Calculate the distance in m from the base of the cliff to the point where the car strikes the ground. should i be considering this problem in x and y...
  16. cepheid

    Thin Film Interference | Observing Puddles of Oil on Pavement

    I have observed puddles of oil on the pavement with swirling colours more often on overcast days than sunny days. Does the phenonmenon of thin film interference work better with diffuse/scattered light than light coming directly from a source? Or, is it a question of light incident at an oblique...
  17. P

    Why Does a Soap Film of Thickness Lambda/4 Maximize Brightness?

    There is a soap film of thickness t in air. I don't understand intuitively why a film thickness of of t = lambda/4 where lambda is the length of the light that is incident upon the film, results in maximum brightness of the light. I know that this is true from the equation for interference but...
  18. S

    Independant Film Maker talks about Movie Piracy

    http://www.undergroundfilm.org/films/detail.tcl?wid=1017942 :biggrin: :-p :approve: :-p :smile:
  19. M

    Can a Non-Profit Film on Quantum Physics Attract Volunteer Science Advisors?

    Hello everyone! I recently discovered this wonderful forum while searching for references for an upcoming film I'm currently working on. I know this is going to sound like a strange request, but I'm looking for anyone interested in being a science advisor for our film. Before anyone gets too...
  20. A

    Ang Lee's Brokeback Mountain wins prestigious film award

    Ang Lee's "Brokeback Mountain" wins prestigious film award Ang Lee, director of films like "Crouching Tiger, Hidden Dragon", "Sense and Sensibility" won the Golden Lion award at Venice film festival. "Brokeback Mountain" features Jake Gyllenhaal and Heath Ledger, and tells a story of two...
  21. K

    Unpacking Physics Jargon: Dialogue for a Short Film Scene

    This may be an odd post, but I'm writing a short film in which a college student is having some trouble with a general physics course. Having never taken physics myself, I'm looking for sample dialogue to use in a particular scene. What I need help with is the professor's dialogue in this...
  22. zoobyshoe

    Uncovering the Patterson Film Hoax - National Geographic Investigation

    National Graphic Channel recently aired a skepticism/debunking program of the bigfoot phenomenon and they presented a piece of evidence concerning the Patterson film that has thrown me completely over into believing it was a hoax. This piece of evidence was the walking gait of Bob...
  23. H

    Thin Film Interference: Deriving Equation

    My professor gave the equation: 2t + \frac{\lambda}{2} = (m + \frac{1}{2})\lambda How did he derive this..where does it come from?
  24. 4

    Thin Film Interference Problems

    There's two problems I can't seem to figure out... I sort of got the answer, except I used m as 28 instead of 27. So my question is why are you suppose to use m as 27 to multiply instead of 28? Also What do they mean by incident normally, is it like striking the glass at a right angel? and...
  25. A

    Why Does Film Blur with Basic Box Camera? | Explaining Focus

    this is what i would expect from a conical perspective on a flat plane that is how a basic camera works, the farther the film from the hole the bigger the projection of the image but insted the image gets blurry, why? in a close image the center of the picture is closer to the viewer than the...
  26. H

    Thin film iridescence/interference

    Does anyone know or direct me to a website that relates the interference observed in thin-film iridescense to the refractive indices of the materials (i.e. glass/air/glass)
  27. S

    What Should the Index of Refraction Be for Zero Reflectivity at 532nm?

    A physicist wishes to deposit a thin film on both sides of a glass (with index of refraction 1.50) window to reduce reflected light of wavelength 532nm to 0% In order to achieve 100% destructive interference for light reflectedo ff of the air /thing film inteference and the light reflected...
  28. K

    Thin film interference on pavement

    A thin film of oil (n = 1.26) is located on a smooth, wet pavement. When viewed perpendicular to the pavement, the film appears to be predominantly red (640 nm) and has no component of wavelength 512 nm. How thick is the oil film? I'm getting confused by the use of two wavelengths in this...
  29. P

    Need help with thin film interference

    A student diving in a swimming pool (filled with water with index of refraction 1.33) creates thin films of air. Viewed underwater, what are the first two non-zero thicknesses of an air film for which there will be constructive interference for reflection off the surfaces of the bubble for...
  30. D

    Have you seen Gattaca yet? Mind-blowing and thought-provoking!

    Just finished watching the movie. Absolutely stupefying. For the first time in my life, i feel almost in complete speechlessness. Its deep, philosophical tone; its variety of messages communicated, after which the thunderous apex in the background music just erupts in the face of the...
  31. S

    Solving Film Projection & Telescope Questions

    URGENT Can you please help! Hello, I have just finished what seems like an infinite amount of questions for this lab report. 2 of them I am just not sure how to proceed. Any help would be appreciated. Question 1: In a film projection apparatus, it is desired to produce pictures 12 ft...
  32. A

    Mysterious Cave Creatures: Investigating Rods on Film

    Does anyone have any information on the creatures if any that are captured on film in large caves in south america and other places? I think they are called rods or something. They look like large centapeeds that fly thru the air very fast. Just courious if this is just camera speed settings...
  33. N

    OPTICS: Thin Film Interference

    Please help: Two rectangular pieces of plane glass are laid one upon the other on a table. A thin strip of paper is placed between them at one edge so that a very thin wedge of air is formed. The plates are illuminated at normal incidence by 546-nm light from a mercury-vapor lamp...
  34. D

    This Land: A Hilarious Film by Jay Leno

    This film was shown on the Jay Leno film. It's hilarious. :smile: http://atomfilms.shockwave.com/contentPlay/shockwave.jsp?id=this_land&track=0
  35. G

    News More about the candidates: here's a film we can all enjoy

    http://atomfilms.shockwave.com/af/content/this_land No propaganda ... just a hilarious commentary on the sorry choices we're being offered.
  36. I

    Exploring Time Travel Through Film: Reflections on "Movie

    if anyone has seen this movie i'd like to know your thoughts on how it portrais time travel.
  37. J

    Solving a Camera Lens Problem: Height of Image on Film

    i need some help with this problem anyone want to give it a shot? thanks A camera is supplied with two interchangeable lenses, whose focal lengths are 35.0 and 150.0 mm. A woman whose height is 1.80 m stands 10.00 m in front of the camera. What is the height (including sign) of her image on...
  38. K

    Figuring Out the Radius of Curvature for Separating CO & N2 on Film

    I have two molecules CO and N2 with masses 28.0106u and 28.0134u respectively. I need to determine the radius of curvature the spectrometer must have if the molecules are to be separated on film by 0.50mm. I don't even know where to begin to solve this. The only equation relating to it in...
  39. Ivan Seeking

    [bigfoot] Challenge to CSICOP re Patterson film

    http://www.bfro.net/news/challenge/home.asp
  40. zoobyshoe

    Man Claims He Played Bigfoot In Patterson Film

    washingtonpost.com > Style > The Reliable Source The Reliable Source By Richard Leiby Sunday, March 7, 2004; Page D03 Sasquatch Speaks: The Truth Is Out There Now it can be told: Bigfoot isn't real! So says Bob Heironimus, a retired Pepsi bottler from Yakima, Wash., who reveals...
  41. S

    Optics, concerning a thin film

    My friend asked me earlier about this homework he had. He said, there's a thin film on a piece of glass, and when you look at it, it looks green. Is this contructive interference? So, I was thinking, This would be kind of an iridesence? Depending on what angle you were looking at the film...
  42. Ivan Seeking

    "Actual Crop Cylinders Caught on Film!

    Actual Crop Cylinders caught on film! http://www.qubit.org/people/david/UFO/UFO.html Compliements of David Deutsch.
  43. P

    Photovoltaics film solar cell technology

    Hey all, New guy on the site. Just to start off, I'm 15 year old who enjoys reading (mainly physics). Now, as many may already know, current crystaline silicon has been proven to have a total efficiency of 25%. Some companies have even quit on their thin film solar cell technology due...
  44. M

    Questions on Thin film interferrence (split from Snells law thread)

    There are two things that bother me about the reemission idea. The first is that the reemission has to be in discrete frequencies. So you'd think that many atoms together cause degeneration so that essential any frequency (say in the visible range) can be emitted. Ok so far but what about...
  45. T

    Why does a text become blurred, looking at it through a polyethylene film?

    If you cover printed text with a piece of transparent polyethylene film you can still easily read it. As you gradually lift up the film, the text becomes increasingly blurred and may even disappear. Why that? I guess it has something to do with the structure of the film's surface, but I'm not...
  46. Rog

    Effect of Stopping Earth's Rotation on Gravity/Orbit

    I have not seen the film however in the advertising they say that they must stop a weapon that will stop the Earth spinning. I was wondering what orbital effect this would have on the Earth in realtion to the sun and moon. I also wondered what gravitational effect this would have on us standing...
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