Images Definition and 366 Threads

I saw in some papers SEM colored images. Does anybody have an idea about the software that may be used?? and how? thanks

An object is placed two focal lengths from a diverging lens, (a) What kind of image forms? (b) What is the magnification? (c) Where is the image? I am pretty sure the image is virtual, as for (b) and (c) I have no idea what to do.. Looking for some help, thanks in advance.. (a) I am...

Homework Statement In the following diagram, why not 6 images are produced? Explain thoroughly. And mention the amount of images produced. Problem Image: http://img691.imageshack.us/img691/8315/imageproduced.jpg or http://file15.9q9q.net/preview/92743229/Image-Produced.jpg.htmlPlease...

Homework Statement Consider a square matrix A: a. What is the relationship between ker(A) and ker(A^2)? Are they necessarily equal? Is one of them necessarily contained in the other? More generally, What can you say about ker(A), ker(A^2), ker(A^3), ker(A^4),...? b. What can you say...

Hi all, I'm working in application where a camera needs to see in a dark closed area. Imagine a small box, say 8"x8" and there is a camera trying to record inside. In order to get images, we need some light. The problem is how to determine how much light is needed without being too little...

Homework Statement Consider two charges, +q each, placed between two grounded plates at a distance d along the z-axis from each plate. thus, the potential V(x,y,-d) = 0 and V(x,y,d) = 0 and the charges are placed at (+R/2,0,0) and (-R/2,0,0) being a distance R apart. Draw the location and...

New Images just released from Nasa- So happy we still have Hubble! They're everywhere on online, though You can find them on Youtube, at "Hubble Spectacular First Light Images in HD". cheers, joono

What is the exact definition of a real/virtual image? This is what gave rise to the doubt. Suppose we have a pair of plane mirrors inclined at any angle. A point object lies on the angle bisector of the two mirrors. Now,the object sends out 2 rays,one towards each mirror. These will...

two plane mirrors facing each other are 10m apart. A woman stands 3 m from one of the mirrors and looks at the mirror and sees two distinct images. How far are these images from the woman? this one is a bit confusing.. can somebody knows how to solve it?

[b]1. Point charge in the presence of a grounded conducting sphere given the boundary conditions phi(x)=0 at r=a (V=0) and at r=infinity (V=0) [b]2. The equation I used phi(x)= (q/abs(x-y))+(q'/abs(x-y))=(q/abs(x*nhatsubx-y'nhatsuby))+ (q'/abs(x'*nhatsubx-y'*nhatsuby') [b]3. The...

I'm sorry if this is covered in a tutorial somewhere on here, but I couldn't find it. What I want to be able and do, is write in LaTeX code, and then export the product as an image. I've tried to do it on my own, but I just got bogged down by all sorts of sophisticated programs. I've...

I am using quite a few images from other neuroscience papers or medical books in my paper. I went through the recommended procedure of writing to the authors and copyright owners about six weeks ago. All the authors wrote back right away and said ok to use. The copyright owners: journals and...

1. Shiny lawn spheres placed on pedestals are convex mirrors. One such sphere has a diameter of 40 cm. A 12 cm robin sits in a tree 1.5 m from the sphere. a) Where is the image of the robin? b) How long is the robin's image? 2. 1/f = 1/do + 1/di 3. a. 1/f = 1/do + 1/di...

I was working on some dark field filters and I was wondering if you could substitute the black spot in the centre of a dark field filter for a completely black filter with a light passing hole in the middle. Sort of an inverted dark field filter. I seem to remember reading something like this...

Homework Statement Let D* be the parallelogram with vertices at (-1,3), (0,0), (2,-1), and (1,2), and let D be the rectangle D = [0,1] X [0,1]. Find a T such that D is the image set of D8 under T. Homework Equations Not much to say other than T(D*) = D The Attempt at a Solution...

Homework Statement A grounded spherical shell has inner radius of 1m. and outer radius of 2m. Q1=1 Coul. is located at x=0.5m and Q2=-2 Coul. is located at x=4m, respectively. Homework Equations Find the charge system to find the potential outside the shell. Find the charge system to find...

http://www.stsci.edu/institute/conference/blackholemergers Eight images. Four on the left appear to be stills from a computer simulation of a merger, calculated step by step using numerical GR methods. The four on the right seem to be actual photographs, some with false color showing...

Homework Statement A conducting sphere of charge Q and radius A is located at a distance D from the sphere's center to an infinite, grounded, conducting plane. Ultimately, I would like to find the capacitance, but that is simple once I find the potential. So the question is:How does one...

I've been working with image charges for a while now, and I have noticed that I haven't been able to find a single discussion on the use of image charges for concave geometries (i.e. a charge on the "inside" of a catenary shaped curved conducting plate, see attached picture). Has anyone worked...

Homework Statement A red ball is placed at point A in the figure. (Intro 1 figure) : figure attached How many images are seen by an observer at point O? Where is each image seen by an observer located? Enter your answers as an ordered pairs (x, y) separated with comma(s), where x and...

Homework Statement A point charge +q is initially at distance x from a conducting plane of infinite extent and held at zero potential. Find the work done in moving the charge to an infinite distance from the plane. Hence find the minimum energy an electron must have in order to escape from a...

Hi, I've been trying to understand more on frequency plots of images. 1. Assuming a 1d example of just a strip of an image; in the frequency map there are 'same' no. of frequencies as there are pixels. What is the reason for this? Does this have something to do with the Nyquist theorom...

Hi I am trying to include pictures in my physics course work but come up with these errors . I am using MikTex and writing in WinEdit. Thanks David

In Griffiths' text "Introduction to electrodynamics", p.125, how does the author get (3.15) and (3.16)? I try for an hour to deduce the relation with geometry, but still can't get that.

Hello guys, I'm having some trouble getting my head around the method of images, partly due to confusing notes and things. If I have a charge +q at a fixed point (0,0,a) above a conducting plane that is held at zero potential, it is said that the plane can be replaced with a charge of -q...

How do I know the image is inverted? Reporter photographs an actress. The ratio of the actual height of the actress to the height of the image on the film is M = hi/ho = .00471 f = .220

I've been trying to use LaTeX in a response, but the preview keeps showing images of different LaTeX expressions which I used in previous responses. This happens even for the most trivial case such as just a single letter X, both in ITEX and TEX tags. Is there something I need to do to reset...

http://www.boston.com/bigpicture/2008/11/peering_into_the_micro_world.html" (Including the usual, potentially disturbing, giant monster dust mite images but lots of other cool ones too.)

Hi. I am an artist and currently working on a project using mirrors. I need to transfer an image (portrait photo) onto a mirror so I can trace directly on the mirror surface so I have the guides to then paint over it. I would like to be able to use an overhead projector but of course the light...

Hi! Is there possible to improve the quality of the images generated by latex code? It should be good if anti aliasing could be turned on, which would produce smooth and fine images. Now, the text looks a little bit awkward in my opinion, since it it all edged, and the small text is hard to read.

I was reading a bit on thin lenses when a postulation was made that the image formed from the first surface would be the object for the second. The postulation made sense for when the first image is virtual, but I don't see how it works when the first image is real? Can anyone provide me the...

Homework Statement The rear window in a car is approximately a rectangle, 1.3 m wide and 0.30 m high. The inside rear-view mirror is 0.62 m from the driver's eyes, and 1.58 m from the rear window. What are the minimum dimensions for the rear-view mirror if the driver is to be able to see the...

Homework Statement Considering the periodic boundary conditions (given below) I am supposed to find the solution T(x,t) with the initial condition T(x,0)=\delta(x) Also I am limited to use method of images so I can't use separation of variables unfortunately. Homework Equations The boundary...

Messenger has sent back new pictures of Mercury. http://www.nasa.gov/mission_pages/messenger/multimedia/index.html The first 4 pictures in the table were relayed back yesterday.

A grounded & conducting spherical shell of outer radius M and inner radius N has a point charge Q inside the shell at a distance r<M from center. Using method of images, find the potential inside the sphere. Could I just use the superposition of charge and point charge? \phi(r) =...

[FONT="Courier New"][SIZE="4"]http://answerboard.cramster.com/other-topic-5-311900-0.aspx" [FONT="Franklin Gothic Medium"][SIZE="3"]I need help getting some ideas for an example of a function. Any help, ideas, suggestions, and/or tips are greatly appreciated. Thanks for looking at this...

How do I describe the image of a function like. f(z) = (z-i)/(z+i) given that the length of z is equal to one. The domain is the unit circle. Is the best way just let z=x+yi and then see what comes out? Or is there a simpler way of doing it.

hi am in need of some emotional pictures about global warming other than having images about melting of glaciers

I was sitting with my girlfriend yesterday and we were looking at videos of comets and meteorites because I wanted to show her the schumacher levy 9 impacts, that she had never heard of! :bugeye: :cry: Then we kind of did some link following which went a little like this: Comets, meteorites...

Homework Statement Given an infinitely long wire, with charge density \lambda, parallel to and a distance d above an infinite, grounded, conducting sheet, what is the potential, V(x,y,z) above the sheet? What is the induced charge on the sheet? Homework Equations The Attempt at a...

I have never understood how images are reflected in mirrors, even now that I am going into my fourth year of university I have some really basic (probably stupid) questions that I need to ask. When an word is reflected in a mirror, why do the letters appear reversed but the word doesn't (the...

No one thought something useful could be learned on 4chan, until now. http://orz.4chan.org/hr/res/381892.html Apparently renaming a file (such as an .mp3) to .raw and then saving it (using IrfanView or Photoshop) to PNG will allow you to retain the useful information in the image file...

A coherent fiber bundle is very useful in transmitting images. Let's say we have a gaussian beam from a laser as our source. Now the acceptance angle(2*alpha) is determined from the location of the beam waist, right? The light ray will then go down the fiber core with the use of a converging...

Homework Statement this is a 2 part problem let G: T-----> (Sigma) be the gaus map of the torus T derived from its outward unit normal U. What are the image curves under G of the meridians and parallels of T? What points of (Sigma) are the image of exactly two points of T? And Let...

1. An object is placed in front of a converging lens in such a position that the lens (f = 11.0 cm) creates a real image located 27.0 cm from the lens. Then, with the object remaining in place, the lens is replaced with another converging lens (f = 19.0 cm). A new, real image is formed. What is...

The setup is: Suppose that we have a point charge q held a distance d from an infinite, grounded, conducting plate. Let the plate lie in the xy-plane, and suppose that the point charge is located at coordinates (0, 0, d). What is the scalar potential above the plane? The solution to this...

Hi, As is the case with functions, we can always define the inverse image of a subset. In the case of schemes I was wondering if there is something that could be taken as the inverse image of a subscheme? Example: Let f:X->Y be a scheme morphism. Then if U is an open subscheme of Y, we...

[SOLVED] wrapping text around images I am using the above instructions to put images in my latex articles. However they take up a lot of space. How can I make the text wrap around them?

Hi, I am new to LaTeX and am having trouble putting images up on a document; I am using TeXnicCenter (in it u can use .jpg or .pnp files aprently but not .ps). i use \usepackage(graphicx) ... \insertgraphic(sample.jpg) which I thought should be enough to display the image. compiling...

I'm doing a presentation for coursework, and would like to include some figures which are in other papers (on my computer in PDF format). What is the best way to get one of these images and include it in my document (latex)? I can just select it and copy/paste to an image file, but is there a...