Film Definition and 309 Threads

Hello! There're very thin (4-15 nm) semiconductor films (passive film) formed on stainless steel by electrochemical method. In a electrochemical cell, I applied potential on stainless steel electrode to adjust Fermi level of the semiconductor passive film. I think that band bending take place...

For instance, I know if a light wave traveling air (n = 1) enters a thin film of water (n = 1.33), there will be a phase difference. My textbook sol'n manual states that there will be a 180 degree phase difference for a wave of light that reflects of the top of the air-water boundary, but NO...

This is not a homework problem but a general problem I've been having when studying for physics. What is the formula for "thickness" for thin film interference problems? I read somewhere that there are a variety of equations that can be used--depending on interferences, and etc--however, I...

Hi guys I wanted to know if somebody can guide me on how to run a symmetrical grazing angle XRD on carbon thin films. I have been doing asymmetric grazing angle which predominantely measures diffraction pattern which is out of plane (normal) to the substrate. Now, I want to do an in-plane...

Hi Everyone, I hope everyone had a very enjoyable holiday season. Currently I'm developing a short film to shoot later this year. Being ever fascinated with the natural universe and also theoretical physics this film will be a welcome new approach to the science fiction genre. The goal is...

I've learned that when a wave is partially transmitted and partially reflected, it loses some of it's amplitude in order to conserve energy. How then, in thin film interference, can one wave produce complete destructive interference with the other if it has been partially transmitted? Wouldn't...

I think the title is pretty well says it. What are the stereotypes and story devices used in fiction of any variety including film, television, writing, ect that you find to be annoying? I have been watching the first season of the show Fringe and it has reminded me of just how much screams...

Homework Statement What is the thinnest film of a coating with n = 1.43 on glass (n=1.52) for which destructive interference of the red component (660 nm) of an incident white light beam in air can take place by reflection? Homework Equations 2t = m*lambda? The Attempt at a...

Hello, I've read that metal film resistors are better than carbon film because they're resistance remains constant even when they heat up from being soldered. And I know they're suppose to be more precise with a 1% variance instead of 5% of the carbon films. I know capacitors go bad - do...

1. The problem statement: A wavelength (λ)550 nm light ray traveling thru a viscous medium n1= 1.46 strikes a a crystal n3=1.5 protected by a film n2=1.25. [b]2. Relevant equation: How can I determine the min thickness of the antireflective coating used to minimize the reflection of...

[FONT="Palatino Linotype"] Friends,seeking some doctoral Researchers in the sub-domain of thin-films,I would want the following assistance from any of them: (1)A Standard Reference Book that addresses introductory (Post Grad.) and advanced (PhD) topics in thin Films.(2) Some standard Lab...

In the beginning scene of the film One Eight Seven, Samuel Jackson's character has one of his students hold a bicycle while sitting in a chair, and pump the pedals until the wheel got up to around 180 rpm. When he told the student to tilt the bike to the right, the chair started rotating...

1) In a double-slit experiment, two parallel slits are illuminated first by light of wavelength 460nm, and then by light of unknown wavelength. The third-order (m = 3) dark fringe resulting from the known wavelength of light falls in the same place on the screen as the second-order (m = 2)...

when doing hall effect measurement, will the thicknes of thin film affect the result?what is the best thickness to do the measurement?

In deposition of thin film on a p-type silicon, how to make sure the thickness of the thin film will not affect or affect the least the electrical(Hall Effect) and structural properties? how to know how thick is the thin film that most suitable? can it be calculated? by the way, the thin film...

I just saw the trailer for 2012. I was astonished to find myself almost looking forward to it. I think I know why - I think I finally realized that a tiny little piece of me - the piece that hoped for years beyond hope that there will ever be a well-done actual science fiction movie released...

Definitely a must see. This movie was shocking. Some of the things food companies are getting away with and how they are able to write our laws is incredible. If you care about your health and what you eat, definitely see this film.

Not really a homework problem. Just wanted to know: When light moves from a medium of lower index of refraction to that of a higher index of refraction, the reflected ray suffers a phase change. (Thin film interference) But the other way round, this doesn't happen. This can be shown by...

Homework Statement Monochromatic light, at normal incidence, strikes a thin film in air. If (lambda) denotes the wavelength in the film, what is the thinnest film in which he reflected light will be a maximum? Homework Equations 2d = (m+1/2)(lambda/nfilm) for minimal reflection and 2d =...

Homework Statement Light of wavelength 547nm is incident perpendicularly on a soap film (n=1.31) suspended in air. What is the smallest nonzero film thickness for which reflected light undergoes constructive interference?Homework Equations 2t = (m + 1/2)(wavelength/nfilm)The Attempt at a...

Homework Statement A uniform film of oil (n=1.31) is floating on water. When sunlight in air is incident normally on the film, an observer finds that the reflected light has a maximum at wavelength (lambda) = 450nm and a minimum at wavelength (lambda) = 600nm. What is the thickness of the...

Homework Statement Esperanza uses a 35-mm camera with a standard lens of focal length 50.0 mm to take a photo of her son Carlos, who is 1.3 m tall and standing 4.0 m away. What must be the distance between the lens and the film to get a properly focused picture? this answer is 50.6 mm...

Homework Statement A thin film of oil (n = 1.50) floats on water (n = 1.33). If the film appears yellow-green (\lambda = 550 nm) when viewed at normal incidence, how thick is it? Given: n_{f} = 1.50 n_{water} = 1.33 \lambda_{0} = 550 nm \theta_{i} = 0 Required: Thickness (d)...

The thin metal film is scored with some pattern to 50-80% of its thickness. When exerted shear stress, the film will crack/open at score. I wonder what simple/practical techniques can be used to detect its pinhole or opening in real time?

A thin soap film (n=1.318) suspended in air has a uniform thickness. When white light strikes the film at normal incidence, violet light (412 nm) is constructively reflected. At what angle of incidence will green light (564 nm) be most strongly reflected? Assume that the film as the minimum...

A proton (m=1.67x10^-27 kg) that has a speed of 5.0x10^6 m/s passes through a metal film of thickness 0.010mm and emerges with a speed of 2.0x10^6 m/s. How large an average force opposed its motion through the film?? can anybody give me a clue on where i can start?

Homework Statement Light waves of which wavelength will destructively interfere due to the thickness of the bubble film? The bubble film thickness is 165 nm, with an index of refraction of n = 1.3. a= 430 nm b= 650 nm c= 860 nm d= 285 nm (different wavelengths) Homework Equations...

ok so i know why this happens but I am just not sure how to see how thick the film would be, I am not sure if your supposed to use the equation dsin(-)=wavelength someone help please thanks! You are outside in the Sun blowing bubbles. As you raise the round wand to blow bubbles, you notice an...

Homework Statement A transparent oil with an index of refraction of 1.25 spills on the surface of the water (n=1.33), producing a maximum of reflection with incident orange light (\lambda = 602nm in air.) Determine the lowest possible thickness (in nm) of the oil slick.Homework Equations...

I don't have a particular homework inquiry to ask, just some questions I have about thin-film interference and its related equations. I was told by my instructor to learn these concepts on my own and I am just having a few problems I want to clarify. 1) Equations related to thin-film...

Hello, I'm currently doing a project which involves generating power from thin film solar panels, I have found the kind I need on a site (http://www.siliconsolar.com/flexible-solar-panels-6v-p-16205.html) which suits my size and power criteria but I am not totally sure how I would go about...

Fans bid farewell to Polaroid film I've never owned a Polaroid camera myself, but I've used them in introductory physics labs. When I was a grad student, and in my first teaching job, we used them with a strobe lamp to photograph two-dimensional trajectories for projectile motion. Students...

story http://www.nytimes.com/2008/10/28/science/28cough.html Slide show of more interesting shots http://www.nytimes.com/slideshow/2008/10/27/science/102808-Cough_index.html

I am trying to model intrinsic stress of some thin film heterostructures. As I am not a modeler but an experimentalist/processor by trade, I would prefer to minimize the amount of time I spend banging my head against the wall trying to find out if this software is appropriate. So, my question...

Homework Statement A thin film of MgF2 with n = 1.38 coats a piece of glass. Constructive interference is observed for the reflection of light with wavelengths of 500 nm and 625 nm. Part A - What is the thinnest film for which this can occur? Homework Equations t = lambda/2n *(m + .5)...

Movie is available for online viewing: https://www.amazon.com/gp/product/B001GIYC4K/?tag=pfamazon01-20 or for download at: http://slackeruprising.hypernia.com/SlackerUprising_640x360.avi (unfortunately this is down now) or bittorrent...

What is the thinnest film of MgF2 (n = 1.39) on glass that produces a strong reflection for light with a wavelength of 680 nm? This is the exact question I am faced with. I didn't really know where to begin so I tried using the ratio of n-air/wavelength to n-film/(new wavelength) to try and...

Homework Statement An oil film (index of refraction no = 1.48) floating on water (index of refraction nw = 1.33) is illuminated from above by white light at normal incidence. The film is 360.0 nm thick. What is the longest visible wavelength that will be strongly reflected? What is...

Hey, I'm going into my senior year of high school and am applying to some prestigious engineering schools namely berkeley =/ and am concerned about my senior year schedule. it is as follows: IB English II IB Spanish 6 IB European History II IB Physics II TOK/ ? (Maybe law or some history...

Homework Statement What is the minimum (non-zero) thickness of a benzene (n = 1.501) thin film that will result in constructive interference when viewed at normal incidence and illuminated with orange light (lamba = 615 nm)? A glass slide (ng = 1.620) supports the thin film answer= 204 nm...

For thin film interference, I was wondering how you know what the value of m is for the equations: 2nt/λ=m (destructive) 2nt/λ -1/2=m (constructive)

My question concerns thin films of varying thickness. I have a basic understanding of thin film interference, and understand the effects of thickness on wavelength, and that with increasing thickness color fringes will be evident. I understand that the color fringes come from: n*t = m*\lambda...

Why is it that red light can be used in darkrooms when developing film? What is so special about it that it doesn't damage photographic film? I figure red light high wavelength, thus less intensity?

What is the relationship (generally speaking) between film strength, film thickness, and viscosity: If I polish / superfinish the gear teeth, and bearings on trans, can I go with a lighter viscosity oil, to improve the efficiency of a manual transmission, while still keeping reasonable safety...

Here’s an interesting effect discovered by a group of Iranian physicists at Sharif University of Technology in Tehran, Iran (it’s not often we hear from these guys). They placed a thin film of water in a square cell and applied two perpendicular electric fields. One was an external electric...

A camera lens (n = 1.80) is coated with a thin film of magnesium fluoride (n = 1.45) of thickness 80.0 nm. What wavelength in the visible spectrum is most strongly transmitted through the film? I have tried to solve this problem for quite a while now, and i hate to admit that there might be a...

A thin piece of glass with an index of refraction of n2 = 1.50 is placed on top of a medium that has an index of refraction n3 = 2.00. A beam of light traveling in air (n1 = 1.00) shines perpendicularly down on the glass. The beam contains light of only two colors, blue light with a wavelength...

Homework Statement A mixture of red light (wavelength vacuum = 652 nm) and green light (wavelength vacuum = 477 nm) shines perpendicularly on a soap film (n = 1.333) that has air on either side. What is the minimum nonzero thickness of the film, so that destructive interference removes the...

Hi all I am facing a bit problem with this query.Can anyone help me out of this?? In film criticis process 62 people seeing US based film, 75 people seeing Indians film, 86 people seeing chinese film, 45 peoples seeing both US and indians film, 34 people seeing both Indians...

--------- If anyone could help me out it would be greatly appreciated. 2nt = (m[+.5])\lambda