Film Definition and 300 Threads

http://news.bbc.co.uk/1/hi/sci/tech/7130484.stm I saw this on the news this morning and fell instantly in love. And for those wanting it as a pet its quite endangered so the odds are as long as its ears.

Hey guys, I was wondering if someone could explain to me when Thin Film Interference will produce constructive/destructive interference. I think I might understand it, but I'm not 100% sure and I have a test coming up soon. Any help would be great! Ok, so I know we have the equation: 2t =...

A thin film is put on the surface of glass, with indexes of refraction of x and y respectively. If light, with wavelength L in air, is reflected from the 2 sides of the film, to interfere constructively, what is the minimum thickness required. The question is stated just like that, so I...

I was having a bit of trouble with this question: A thin oil slick of refractive index 1.3 floats on water. When a beam of white light strikes this thin film vertically, the only colours enhanced in the reflected beam seen in air are orange-red (650nm) and violet (430nm). What is the thickness...

This is an actual real-life problem. There is a machine that winds film at my work. I need to determine the torque required (T_2) and force needed (N) for the conditions showed in my diagram when all variables except F_T2 are known. Roll #2 begins with no film and ends as a large roll with...

Hello, I have a camera I am using to monitor some items, and the shield for it is exposed to a lot of mist (oil-based ink). An issue I am having is that this guard is quickly becoming covered, rendering the camera useless. It is dificult to access the camera, so cleaning it by hand becomes...

I need help with this question: "Name the wave phenomenon that is responsible for the formation of regions of different color when white light is reflected from a thin film floating on water." In my handy-dandy high-school physics book, it says that "The different thickness of the gasoline...

How internal reflection affect the performance of the thin film emissive display devices?

Hi i was going through some of my physics past papers to prepare for exams, when i came across this question A film of oil of refractive index 1.45 rests on a flat piece of glass of refractive index 1.6. When illuminated by white light at normal incidence, light of wavelengths 690 nm and 460...

Consider a soap film where both sides of the film is air. So reflected light has a π phase change. Consider constructive interference, 2 d "nfilm" + 1/2λ = nλ , where "nfilm" is the refractive index of the film and d is the thickness the film. Due to the gravity, the film at the bottom...

Homework Statement A thin film of oil (n = 1.23) is located on a smooth, wet pavement. When viewed perpendicular to the pavement, the film reflects most strongly red light at 640 nm and reflects no light at 569 nm. How thick is the oil film? Homework Equations...

HELP! [Confused] Case: Fuji Film Introduces Aps In the early 1990s, Fuji Photo Film, USA, joined forces with four of its rivals to create the Advanced Photo System (APS), which is hailed as the first major development in the film industry since 35 - millimeter technology was introduced. In...

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...

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'

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...

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...

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...

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...

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=...

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...

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...

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...

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

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

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...

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...

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...

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...

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...

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

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...

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...

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

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...

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...

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)

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...

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...

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...

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...

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...

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...

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...

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

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...

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...

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...

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...

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...

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...