What is Film: Definition and 345 Discussions

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.

View More On Wikipedia.org
  1. M

    Thin film interference and anti-reflective coating

    Hi, I actually have two questions that are somewhat related so I am including them in one post. I add much more detail about the system then probably necessary because I'd like to see if I have a correct understanding of how the system works in addition to the question itself. Please bear with...
  2. F

    Deposit Indium Film on Metal Bar - Cheap Prototyping Method

    I want to deposit a layer of indium with a thickness of 10-100 microns on a metal bar. What would be cheap method for prototyping this? I am considering either soldering the indium and then flattening it or using an electron evaporator beam. Any other suggestions?
  3. T

    How do you calculate the minimum film thickness?

    Hi, i am wondering how do you calculate the minimum film thickness between two plates, one smooth surface and another surface with a square microasperity. i am just very confused as to how do you determine the film thickness in between them. I have attached a paper which has a graph on...
  4. F

    A little magic trick with polarized film

    A little "magic" trick with polarized film DO try this at home! I took three pieces of polarized film (which I salvaged from a pair of 3-D glasses). First I put two pieces together (A and B), one rotated at 90 degrees to the other. This effectively blocks out almost all the light. Then, I took...
  5. A

    Thin film constructive vs destructive concept clarification

    Homework Statement So if light travels from vacuum to oil to water (1 -> 1.4 -> 1.33) how do you know if there is a constructive or destructive interference? Homework Equations The Attempt at a Solution I know that when it goes from air to the oil there is a phase shift of 1/2...
  6. T

    Thin film selection for Diamond/Nickel interface

    Hello everyone. My task is to select a thin film and deposition method that will achieve a few goals. The thin film will be sandwitched between a diamond and nickel alloy. The thin film needs to: Adhere to a diamond and nickel alloy strongly without inter diffusion. Stay together up...
  7. C

    Purpose of sheet resistance in thin film devices

    In optoelectronics and other nanotechnology applications (like organic photovoltaics, organic LEDs etc) most layers need to be electrically characterized among other types of measurements. Thus, sheet resistance is measured. An example are the 4-point-probe resistivity measurements. Yet, what...
  8. kq6up

    Optical Transmission through a thin Film

    Homework Statement In optics, the following expression needs to be evaluated in calculating the intensity of light transmitted through a film after multiple reflections at the surfaces of the film: {\sum _{ n=0 }^{ \infty }{ { r }^{ 2n } } cos\quad n\theta })^{ 2 }+{ \sum _{ n=0 }^{ \infty...
  9. gfd43tg

    Navier Stokes thin film on infinite wall

    Homework Statement Consider steady, incompressible, parallel, laminar flow of a film of oil falling down an infinite vertical wall (Figure P-1). The oil film thickness is “h” and gravity acts in the negative Z-direction (downward on the figure). There is no applied pressure driving the flow –...
  10. L

    Removing Hissing Sound from Film Audio - Equipment Dependent?

    When you film something using the microphone on the camera or an external microphone, is there always that hissing sound that you have to remove by running the video through a high pass or low pass filter? Or does it depend on the quality of the microphone? I have a pretty cheap microphone, and...
  11. M

    Soap film analogy and sand heap analogy

    Guys, do you know any comprehensive website or reference that explains everything about soap film analogy and sand heap analogy? Including their concepts, procedure on how to perform them and some animations. It will be more useful if the discussion also deals with the reinforced concrete...
  12. A

    Thin Film Interference and wavelength

    Homework Statement Light of wavelength 550 nm in air is normally incident on a glass plate (n=1.5) whose thickness is 1.1 X 10^-5 m. (a) What is the thickness of the glass expressed in terms of the wavelength of light in glass?(b) How many reflected waves will experience the 180 degree phase...
  13. G

    Interference of Light - Thin Film

    Homework Statement Plan plates of glass are in contact along one side and held apart by a wire 0.05 mm in diameter, parallel to the edge in contact and 20 cm distant. Using filtered green mercury light (λ = 546 nm), directed normally on the air film between plates, interference fringes are...
  14. A

    Thickness of film when you are given indexes of refraction. HELP

    Homework Statement You are coating a glass lens of index of refraction 1.6 with a film of material of index of refraction 1.7. You start with the thinnest film possible that creates a strong reflection for 610 nm light. You gradually increase the film thickness until you again get strong...
  15. L

    Necessary accessories for making a film

    So far I have the camera and the external microphone, but I realized that I'm probably going to need some light. I want to get some handheld light source that can provide white light (not the ugly yellow light a lot of bulbs produce). Any ideas on some keywords I could search for on Ebay or...
  16. F

    Troubleshooting XRD Image Analysis on PZT Thin Film

    I have the XRD image of a PZT thin film. While trying to analyze it with JADE software I can not find the proper space group.So it is not giving me the answer I am looking for. I assumed the crystal system to be cubic.
  17. A

    Engineering Graduate Courses In Thin Film Technology and Engineering

    Hi Everyone, I am currently doing my final year in B.Tech Engineering Physics. During these 3 years studying this course, I understood that learning Engineering was never the intent of this course in my college.. Faculty were stuffing us with Pure Physics with Applied or Engineering Physics...
  18. W

    Why Does Thin Film Oil Show Different Colors When Illuminated?

    1. A thin film of oil (no = 1.50) with varying thickness floats on water (nw = 1.33). When it is illuminated from above by white light, the reflected colors are as shown in the figure. In air, the wavelength of yellow light is 580 nm. a. Why are there no reflected colors at point A? b. What is...
  19. andyrk

    Soap Film Formation: Explaining the Phenomenon

    When we dip a wire ring in a soap solution and then take it out, why does it form a soap film inside? Is there any explanation behind it?
  20. K

    Thin Film Interference in Glass Plates: How Many Bright Fringes Will Be Seen?

    Homework Statement A broad beam of light, of wavelength 683nm is sent directly down through the top plate of a pair of glass plates. The plates are 120mm long, touch at the left end and are separated by a wire of a diameter .048mm at the right end. Air between the plates act as a thin film...
  21. G

    How Does Thin Film Thickness Affect Interference Patterns?

    Trying to get my head around constructive/destructive interference in thin film optics. The book does a good job of throwing formulas at you but I want some intuition. If we shine a laser with λ = 600 nm on a thin film of a material with refractive index 1.5, at what thicknesses will we get...
  22. L

    Wear resistant, transparent, flexible thin film, is there any?

    Hi everyone, I need a coating material for an moving object. The coating surface slide over another surface. The coating needs to be transparent to allow optics tracking, and flexible like paper because inner object is flexible, and it needs to be wear resistant to keep the transparent...
  23. H

    How do i demonstrate thin film interference with microscope slides?

    How do i demonstrate thin film interference with microscope slides? Textbook questions all mention that you will get parallel fringes when you put a hair between two microscope slides. However, i have tried doing so, but don't get the parallel fringes. I used a red laser pointer, and a...
  24. M

    Calculate forces acting on liquid film

    Dear all fellow physicists, I am struggling with the following fluid mechanics problem: considering a liquid film in an "equilibrium" position between two plane walls, I am trying to define the forces acting on the liquid. Most importantly, gravity is pulling down on the liquid with Fg = m* g...
  25. Saitama

    Thin film interference - Minimum thickness

    Homework Statement A lens (##\mu##=1.5) is coated with a thin film of refractive index 1.2 in order to reduce the reflection from the surface at ##\lambda=480 nm##. Find the minimum thickness of the film which will minimize the intensity of reflected. [Assume near normal incidence]Homework...
  26. D

    Is biodegradable thin film the future of packaging?

    I'm working for the Company that specialize in thin film polyethylene. I research the tendency of using biodegradable thin film for packaging, Anyone that have knowledge or information about this such as report of the kinds of polymer used in that field. Please give me a help. thanks a lot
  27. N

    Thin Film Interference Problem: A hair is placed at the edge .

    Thin Film Interference Problem: A hair is placed at the edge... Homework Statement Thin Film Interference Problem: A hair is placed at the edge between two 10.0 cm glass plates of n= 1.52. Light of 400 nm wavelength shines on the glass and an interference pattern is formed. If the...
  28. P

    Calculation of thin film thickness from complex refractive index

    Hello, I want to ask how can one calculate the thickness of a thin film (or each of the thin films in a stack of 3-4 thin films on one another) when - complex refractive index of each thin film is known (n and k). This refractive index is obtained from a single wavelength ellipsometer and...
  29. NATURE.M

    Thin Film Interference Problem

    Homework Statement Light strikes two plane sheets of glass with a thin air space between them as shown. If the light has a wavelength of 580 nm and the air space between the glass has a thickness of 870 nm, predict whether the reflected light as demonstrated by rays A and B will cancel or...
  30. P

    Thinnest film that will give constructive interference for red light

    Homework Statement When a thin soap film is very thin, we see it as black. How thick (in nm) is the film in the region where we see the first red band? Take the wavelength of red light to be 752 nm and the index of refraction of the soap to be n = 1.33. Homework Equations [2nt/λ] - 1/2...
  31. E

    Heat Transfer Internal Flow Film Temperature

    I have three temperatures (temperature of the fluid going in, temperature going out, and the temperature of the surface of the tube). What I'm trying to figure out is the film temperature at which I should evaluate the flow properties. The film temperature is defined as T,f = (T,s +...
  32. I

    Solving Thin Film Problem: Find Longest Wavelength Transmitted to Diver

    Homework Statement A scientist notices that an oil slick floating on water when viewed from above has many different rainbow colors reflecting off the surface. She aims a spectrometer at a particular spot and measures the wavelength to be 750 {\rm nm} (in air). The index of refraction of...
  33. S

    How to discharge a clear plastic film roll ? : (

    Hello ! Firstly, i'd like to say that I have nothing to do with physics - and everything I've learned in school - has been forgotten and I really hope you can help me with a small problem I have .. I bought a roll of clear plastic film (100 m) one like this...
  34. Greg Bernhardt

    Giant Squid finally caught on film

    How terrifying! I've always been a bit nervous of the blackness of the see and now there are confirmed monsters in it! http://www.cbsnews.com/8301-205_162-57562424/giant-squid-filmed-alive-in-deep-sea-for-first-time/
  35. K

    Efficiency Of Thin Film Solar Cells

    How does the efficiency of a Thin Film solar cell compare to the efficiency of a single crystal solar cell with reference to the 5 main solar cell parameters ( Iopt , Rs, Rsh, Is and n )? I know series resistance( Rs ) will probably increase in thin film cells because of grain boundaries...
  36. C

    Effect of electrical field on annealing of thin film bismuth

    I have been reading recently on the properties of evaporated thin film bismuth, particularly grain size and resistivity. Usually evaporated bismuth is amorphous and semimetallic, with very small grain size. Grain size can be increased and resistance lowered by annealing the film. It has been...
  37. C

    Thin Film Interference Question

    Homework Statement White light is sent downward onto a horizontal thin film that is sandwiched between two materials. The indexes of refraction are 1.80 for the top material, 1.68 for the thin film, and 1.50 for the bottom material. The film thickness is 5.24*10^-7 m. (a) Of the visible...
  38. Einj

    References for thin film physics?

    Hi all, I'm studying for the GRE test and I have noticed that sometimes questions about thin film appear. Is there any reference where I can learn some basical knowledge about thin film reflection and refraction? I'm not looking for something deep. Just a general overview. Thanks
  39. C

    Black hole drive in the film Event Horizon

    Black hole drive in the film "Event Horizon" Cheesy movie, right? A lot of fun though. For those who don't know, there is a starship in the film called the Event Horizon, which utilizes an artificial black hole drive/engine in order to allow it to fold space, although it's probably more...
  40. C

    Heat produced by thin film resistive heater.

    Hi guys. I am new to this forum and need some help in solving some problems. My company produce thin film heater( doped tin oxide deposited on a substrate such as glass ceramic, beryllium oxide, aluminium nitride or alumina and some others). I need a formula for calculating within a few degrees...
  41. T

    How can a soap film be stable?

    It is said that a soap film will find the surface with the minimum area. If the two interfaces between the soap and the air meet, the soap film can effectively reduce its area by bursting. You would think that if you simply hold a soap film up vertically, all the liquid would want to go to the...
  42. R

    Medical Digital dental x-ray with periapical film

    It is said that digital dental x-ray has less radiation. Is it because the sensor used that acts faster in capturing the image. What if you use a traditional film on a digital dental x-ray. Would the radiation be the same?
  43. V

    What is the film coefficient for a hot object moving through open air?

    I'm trying to estimate the heat transfer coefficient from the surface of a hot object moving through open air. After much searching, all I can find is coefficients for sundry fluids confined within the tubes of heat exchangers. I'm trying to calculate for a body at between 300-460K moving at...
  44. C

    Need Help Writing a Sci-Fi Film Plot with Astronomy

    I am a writer for a newly forged independent film studio. We've managed to drum up some (surprisingly) considerable funding and support from our local community, and along with that we have been allowed access to an observatory and astrophysics department on a nearby college campus. We've...
  45. S

    Optics:thin oil film on water

    A scientist notices that an oil slick floating on water when viewed from above has many different rainbow colors reflecting off of the surface. She aims a spectrometer at a particular spot, and measures the wavelength to be 750 nanometers (in air). The index of refraction of water is 1.33 The...
  46. A

    Can Graphene Film Prevent Helium Loss in Airships?

    I recently saw this: http://arstechnica.com/science/2012/01/size-matters-when-things-are-just-right-water-flows-freely/ and was wondering whether it could be used on an airship to keep helium in the envelope (it often dissipates out). Since graphene is just a 2d version of graphite, would...
  47. V

    Electron-hole pair damping of vibration, thin film resistivity

    Hello, I'm reading something about adsorbate induced surface resistivity changes in thin metal films and there is often mentioning of electron-hole pair damping, as for example: "electron-hole pair damping of the parallel(to the surface of thin film) frustrated vibration of the...
  48. B

    Thin film diffraction - to start

    Thin film diffraction -- need help to start Homework Statement I attached a picture of the problem, could anyone tell how I would begin to proceed with this problem? I believe that it is more complicated than simply a Snell's law problem, due to the thin film of oil. Thanks for your...
  49. B

    Optics problems - real vs, virtual / thin film

    Homework Statement 33. This experiment projects a red laser light beam of wavelength λ through a diffraction grating labeled 750 lines/mm onto a screen that is positioned a distance l from the diffraction grating. The diffraction grating has a distance d between adjacent lines. The...
  50. S

    Thin film (interference problem)

    Homework Statement A sheet of glass having an index of refraction of 1.20 is to be coated with a film of material having an index of refraction of 1.42 such that green light with a wavelength of 525 nm (in air) is preferentially transmitted via constructive interference. What is the minimum...
Back
Top