Images Definition and 366 Threads

Homework Statement A point charge +q is situated a distance a from the center of a grounded conducting sphere of radius R. Find the induced surface charge on the sphere as a function of θ. Integrate this to get the total induced charge.Homework Equations σ=-εo*∂V/∂r Q=∫σ daThe Attempt at a...

Homework Statement I would like to 1)Find the electric field in all the space in the following set up: There's an electric charge q in a region with dielectric constant ##\varepsilon _1## which is at a distance d from a plane that separates the space into 2 regions, namely the one of the...

I am using opera as my browser and have windows xp. I can see text on Internet pages but no pictures on my page. I tried to find Internet tools but I couldn't find it. What should I do. Any help will be much appreciated.

Is there some resource on the net where I can find images of electron orbitals for dihydrogen (H2), helium (He), lithium (Li) and dilithium (Li2)? Alternatively if there is some software that can produce such images, that would be good too.

Homework Statement Have my E&M final tomorrow. Trying to work old test questions. Please check my answer for this question. Uniformly charged sphere of charge Q and radius R, center is a distance d above a grounded plane.Homework Equations V(r) in the interior of a sphere is given in the...

I am struggling on one concept that I can't find when doing a thorough search. System: You have a projector (known to project real images onto a screen). The projector expands light with a lens, the light propagates to a flat mirror on a wall and reflects onto a screen.Conclusion: Although the...

Homework Statement The rear view mirror of a car is a plane mirror. A driver is reversing his car at the speed of 2 m/s. The driver sees in his rear view mirror the image of a truck parked behind hid car. The speed at which the image of the truck appears to approach the driver will be? The...

optics,how many images will the object form? Homework Statement the lens shown in figure 19.16(http://img705.imageshack.us/img705/5066/figure1916.png made of two different materials . a point object is placed on the axis...how many images will the object form? Homework Equations 1/f...

I've gotten into an amusing discussion with another individual on the topic of the apparent size of comets as seen in SOHO satellite images of Sungrazing or Sun-impacting comets. I won't go into the crackpot conspiracy theories I've heard, but will instead ask: why do these tiny comets appear so...

1. Homework Statement Two semi-infinite grounded conductive planes meet at right angles. In the region b/w the conductors, there is the plane with angle 45° having surface charge density σ. Using the method of images, find the field distribution in this region. (There is a picture included...

Homework Statement What is the force on an infinite conducting plane due to two point charges: a +2q located at a height 4h above the plane and a -q charge located at a height 2h above the plane, directly beneath the other point charge. Homework Equations The Attempt at a Solution...

I am trying to using this line: \includegraphics{C:/Users/PhizKid/Desktop/Untitled.jpg} But there is no image showing up when I view the DVI file. What am I doing wrong? (I have \usepackage{graphicx} somewhere at the top) nvm, I got it

Homework Statement There is a charge q, at a distance d from an infinite conducting plane (z=0). Determine the electrostatic potential drop between the z=0 and z=d. Homework Equations Ohm's Law DeltaV=-integral (E.dl) The Attempt at a Solution I know how to do this problem...

When an object is moved away from a plane mirror, its size decrease when seen in the mirror. But, when we draw image on paper for an object in different positions in a plane mirror, the size of the image doesn't seem to change. Why? Will the size change or not?

Hi, I realize that this might be kind of a silly question, but I am in a physics class currently and I'm having the hardest time visualizing what exactly is happening when a 'real image' is formed on the same side as the object (as in the case of an object emitting light on the concave side of...

Homework Statement When we look into a mirror, the image formed in virtual as it cannot be captured on a screen. However, If we shine a torchlight at an angle then the beam of light will reflect and form on a screen. But how are we so different from the torchlight's light? Since we simply...

Lens problem! Hi guys, When an object is placed in front of a convex lens ( not between Focus and optical centre ), the image formed on the other side should be inverted and real. My question is, with the mentioned placement of the object, will the image be laterally inverted? Further more...

Cylindrical lenses focus light rays onto a line instead of a point. Is that means several images will be formed from a point object aftering passing through the lens? (please see the attached files 1 and 2) If I am correct, can anyone explain to me,when you add water to a tall water...

[SIZE="3"][FONT="Times New Roman"]I'm doing a summer internship and my supervisor is currently away and uncontactable. He left me details of certain Hubble images to download and analyse asking for HST images of M31 with coordinates 00:42:52.534 +41:18:54.17 on 2006-07-15 and 2007-01-12...

Hi! I'm writing you to ask about a question, to see if anyone knows how to solve it. I'm doing an interpolation process and I would add a function to a Matlab code that would select and use two dates up and down in the process for a selected image (I opened it before with the function...

We "see" distant objects as they were , sometimes, very, very, long time ago. I assume these images are all in the fleeting / transient - for us - category. What is it in their nature that makes them last - for us, and, potentially, other observers, to "see" them. In our world, all images...

I have a program where the user selects image icons in one JPanel and can place them in another JPanel. The program saves the position of the icons as an array of integers where each integer represents the different icons. I need to also save the final result as a .gif image because otherwise it...

images in a diverging lens are always virtual. when an objectis placed betweenthe focus and optical centre of a converging lens, the image is also virtual. what are the differences between these virtual images? explain by studying the 4 characteristics of each image. i have no idea of...

What's the general rule of thumb for plucking an image off the web and using it in your report? Is this allowed as long as you cite the webpage or do you have to have very explicit permission from the website owner? I don't know what's right and wrong here since I just want to use an image for...

Hello PF, I am using MiKTex and TeXnicCenter for writing my Thesis Report. I want to add images (.jpg or .eps format) into the report. The last one I tried was, \usepackage{graphicx} \begin{figure} \includegraphics[scale=0.40]{121127332} \end{figure} What I get is just a empty...

I'm posting this here, as i feel it's more probability-related than image processing. I'm reading this lecture pdf. At end of page 1 , beginning of page 2 it says: Is this a bit vague, or am i missing something? Since we are calculating frequency of the value a in the pixels of image A, when...

Consider the classic image problem with a conducting plane and a point charge. After finding out the charge density on the plane we integrate to find out the total charge induced. It comes out to be "-q",where q is the charge outside- My book says "It comes out to be -q, as you can convince...

Hello there, I am a Norwegian image maker. Unfortunately, I find discrepancies between photographs of the Earth from the Apollo missions (such as the blue marble) and images from the space shuttle and orbiters, which I cannot explain. They vary from the appearance of the atmospheric scattering...

On the subject of gravitational lensing there seems to be two rather different phenomena. The "arc" phenomena seems rather plausible to me, if light is affected by gravity which is natural then there should be able to get that kind of behaviour. But the multiple imaging stuff, seems rather...

Virtual image?? Nvm I got it. Thank you anyways virtual image is not the actual distance kk.

Homework Statement A biconvex symmetrical lens is cut in two halves and placed as shown in figure. if a point object is placed in the left how many images will be formed options - (a) Two images (b) Three images Homework Equations The Attempt at a Solution As I...

Homework Statement Let T:R^4->R^3 be the linear transformation defined by T( x1, x2,x3,x4) = 2(x1) - 4(x3) (x2) -(x3)+3(x4) (x1)+(x2)-3(x3)+2(x4) Find the vector from the domain, Xd, which gives the image Xr = (2 1 1) in the range of T The Attempt at a Solution I don't need...

Hello everybody, I am working on a project for merging the images of multiple meteorology radars covering a large area. I would like to project each of the images onto a spherical surface and merge them. Do you know if there is a piece of software that can help me with that? I can develop in...

When we look at a mirror we see our image but the light that reaches our eyes also reflects off our bodies back to the mirror again and back to our eyes. Do we see multiple images of our self but somehow ignore all but the primary reflection?

Hello :) I would be very grateful if I get through with this bugging idea. When I started reading about it, the first example was: A point charge in front of a finite plane conductor. And I understood after some mathematical and geometrical procedure how it is okay to replace the finite plane...

Hi. A friend of mine, knowing about a probe (actually, 2) going out from the solar system, asked to me if we can still receive images from them. I searched for these images on the web, but i did not found them. Anyone can suggest to me a link? Thanks :)

Hi, http://imageshack.us/photo/my-images/141/optica.png/ The sphere in the picture is made of glass with n = 1.60. The curved side of this sphere is a mirror. The question is why we see two images of the black dot. Homework Equations Snells law? The Attempt at a Solution One...

A pin AB, 1cm long, is placed at an angle to the principal axis in front of a concave mirror, of focal length 5cm. Point B lies on the principal axis at a distance of 4 cm. Point A is such that the angle ABP is 60°, where P, the pole, is the point where the principal axis intersects the mirror...

Does anyone know of a good resource for these types of problems? I took an Intro to Real Analysis class as an undergrad and didn't do so well in it, but now I am working back through the book, and it is making A LOT more sense than it did back then. However, I was looking for some worked...

sorry, no specific homework question, although it is related to my homework in general. I don't understand what makes an image real or virtual. thanks for the help :) joe

Is it a collage of interacting nuerons and the cohesive accumulation of information? Or something else, don't tell me its dependent on quantum proporties?

Why is it that whenever the method of images is used to solve for the induced charge on a grounded conductor in the presence of a point charge, the total charge is just the same as the image charge?

Everyone always says that there is nothing that can ever remove blur from images. Correct me if I'm wrong, but here's some thoughts: Blur is a distinct mathematical transformation involving however many parameters. Which would mean that no information is lost in the image(except where the blur...

Homework Statement why is it that when one stands outside a cafe in front of its glass wall he can see his own reflection but not the people inside the cafe, and yet the people inside the cafe can see him from the inside?

Dear All I'm looking for free software for converting 100 jpg images to movie without loosing the quality. Kindly advice. Many Thanks Balaji

Why in telescopes and microscopes the ocular distance is such that it creates virtual images instead of real images?

Homework Statement Why does SPECT produce images with higher contrast compared with its alternatives such as PET? The Attempt at a Solution I HAVE NO IDEA! I honestly researched everywhere, they only say that it has a higher contrast. I think its something to do with the hardness...

Hi, I am looking for some detailed electron microscop images of HIV virus itself. I need it bigger and more detailed then this: http://www.allvoices.com/contributed-news/9114517/image/80168820-hiv-virus-electron-micro-graph I would like to have some picture, not computer render or...

My Optics text shows how the light rays reflecting off a spherical mirror appear to have been emitted from a single point, hence producing a well-formed image. The text then says that this is true "for any mirror whose curvature is gentle enough and that is symmetric with respect to rotation...

Basically, I'm trying to revise lenses and the one thing I never really understood was how to tell whether an image is magnified or diminished. http://store.aqa.org.uk/qual/gce/pdf/AQA-2450-W-TRB-OGA.PDF pages 6 and 7 has the diagrams to show what I mean I can do the geometry of an object...