Image Definition and 1000 Threads

I do not know if this counts as number theory, but I came to this question while studying number theory, so I post this here. Suppose X and Y are reduced schemes of finite type over a field k and f:X->Y is a morphism. Ox denotes the structural sheaf of X. Question What is a stalk of the...

Hi... Apologies if this is in the wrong section but it is kind of homework related. I'm looking at an ultraviolet image of the sun... Would I be right in saying that brighter areas represent higher temperatures and darker regions represent lower teperatures?

light travels more slowly in vegetable oil than in water. Will an object appear larger or smaller if the beaker is filled with oil rather than water?...help me thanks

Homework Statement A lens placed at the origin with its axis pointing along the x-axis produces a real inverted image at x = -24 cm that is twice as tall as the object What is the image distance? Homework Equations m = -d'/d The Attempt at a Solution I thought d=24 cm. and h'...

I've got a terrible picture from a mobile phone's camera. Can someone recommend good software for image enhancement? For starters, what is the best method for resampling that is available in freeware?

Homework Statement As shown in the figure View Figure the candle is at the center of curvature of the concave mirror, whose focal length is 10.0 {\rm cm}. The converging lens has a focal length of 32.0 {\rm cm} and is 85.0 {\rm cm} to the right of the candle. The candle is viewed looking...

Can anyone solve me these questions, please 1. A convergent lens has one 8 cm focal length. One places a 2 cm height object at 4 cm of his optical center. Find the various characteristics of the image obtained. 2. A divergent lens has one 8 cm focal length. One places a 2 cm height object...

Homework Statement Prove: If f is injective (1-1), then f^-1 [ f(C) ] = C Homework Equations f: A -> B C is a subset of A, and D is a subset of B note f^-1(D) is the preimage of D in set A and f(C) is image of C in set B The Attempt at a Solution My attempt: Assume f...

If the magnification for an image is equal to –3.5, what is the nature of the image? I am having difficulties understanding this question and finding answer. Can anyone can tell me where can I find information about this question or how to solve it?...

Problem 1: A thin hollow glass sphere has a radius of 1 m. A coin is placed at the bottom of the glass sphere. 2.09 metre cube of a liquid of refractive index 1.5 is poured into the glass shpere. A person is viewing the object vertically. What is the apparent depth of the coin? Im not sure...

[SOLVED] Kernel and image of a matrix A Homework Statement If I have a matrix A, then the kernel of A is the solution to Ax=0? The image of A is just the vectors that span the column space? I have looked through my book and searched the WWW, but I can't find the answer to these...

Homework Statement An object is kept at a distance d=2.5cm from a Glass sphere of radii R=10 cm .Find the final image of the point object? \mu =1.5Homework Equations \frac{\mu_{2}}{v}-\frac{\mu_{1}}{u}=\frac{\mu_{2}-\mu_{1}}{R}The Attempt at a Solution it is a simple question where we have two...

Homework Statement There is a sphere of Radius R. A point object is kept at a distance b from it.Now the sphere is halfed about an axis perpendicular line joining the object and centre of the sphere.The planar surface of the hemisphere away from the object is silvered.Find the distance of the...

A concave mirror has a radius of curvature of 0.5 m. At what position should and object be placed to produce an upright virtual image that is 3.0 times as large as the object? I have just no clue for this question,, but I have to understand it T.T can any1 help me please>..

I have been trying to find the explanation why the wavelength of a wave is the limit of the resolution of an image (i.e. one cannot see the detail smaller than the wavelength), which is sited as the reason why we cannot see an atom using visible light. I don't think I really understand why this...

1.Dubbie is moving directly along a normal line toward a plain mirror at a speed of 3.5 m/s, what is the speed of the image relative to Dubbie? 2. What is the speed of the image, relative to Dubbie, if Dubbie walk away from the mirror surface at 3.5 m/s at an angle of 300 to the...

I once worked with a guy who had been hit in the head by lightning. As he described it, he was sitting on his porch and looking at a stop sign about a quarter-mile up the road. The last thing that he remembers - apparently at the moment of the strike - was the stop sign appearing to be...

[SOLVED] Inverse Image of a Compact Set -- Bounded? Problem: Let f : X → Y be a continuous function, K ⊂ Y - compact set. Is it true that f^{-1}(K)– the inverse image of a compact set– is bounded? Prove or provide counterexample. Questions Generated: 1. Why does compactness matter? (I...

I'm really unsure how to go about graphing a complex function. Like, f(z) = z^2, where z = x+iy. This ISN'T a homework problem, but I'm studying for an exam and that's an example in a book I'm reading and it says "the image of this function" and goes on explaining some things relevant to...

Homework Statement Find a basis for the image of the linear transformation T: R^4 -->R^3 given by the formula T(a,b,c,d) = (4a+b -2c - 3d, 2a + b + c - 4d, 6a - 9c + 9d) Homework Equations The Attempt at a Solution Well this question followed asking about the basis for the kernel...

In the image below, you'll see two shapes, one of which is orange, and the other is purple. One of the images stands for the word "BUBA", and the other stands for the word "KIKI" The question of this poll is: In your opinion, which image best represents "KIKI" and which represents "BUBA"...

I've been trying to find the source of this image, or ones similar to it, for yonks. The image is incomplete, which doesn't help. The reason I ask this on a physics forum is because it reminds me of those images out of the physics textbooks I used to have. Looking at the concentric...

A 1.0 cm high object is situated 11.0 cm in front of a concave mirror that has a radius of curvature of 8.00 cm. Using a ray diagram drawn to scale (the mirror must be drawn to scale): (a) measure the location of the image: 6cm (infront of the mirror) (b) measure the...

http://news.yahoo.com/s/nm/20071012/ts_nm/usa_politics_world_dc Notice most said the US needs to only change its image & not necessarily change what it does; that guy Bill Anderson has the right idea though. That lady who tried to say "it's a jealous world" & people in other countries are...

1)Question: The focal length of a convex lens is 16cm. Where must be an object be placed so that the image formed by the lens is a)real and twice as large b)virtual and twice as large 2)Related equation: i)magnification=(height of image) over (height of object)...

Hi everybody, new here. Okay, I will get straight to the chase. I am an undergrad student and I am current taking a course in electromagnetics--transmissions lines... Anyways we just had an exam yesterday and there was a question on it that I believe may have serious flaws. I will try to...

As we know if the angle between two intersecting plane mirrors is 60 degrees 360/60 minus 1= 5 images of an object between the mirrors are formed. what will happen if the angle is 65 or 42,6 degrees?

How can I copy my the entire harddrive image from my IBM Thinkpad T40 to another IBM Thinkpad R52? Since there is dissimilar hardware a simple backup/restore will not work. I have read about a few products that can do this. I am just trying to find the easiest way to make this happen.

Hi, everyone: I have been reading Boothby's intro to diff. manifolds, and in def. 4.3, talking about 1-1 immersions F:N->M , n and m-mfld. and M an m-mfld. That: "...F establishes a 1-1 correspondence between N and the image N'=F(N) of M. If we use this correspondence to give...

1. When we talk about flat mirrors, it says that the size of image appears in the mirror is the same as of the object. Is the long rectangular mirror at home that is hang on the bedroom door to see how you look like when you dress up a flat mirror? If so, then when we approach the mirror, our...

Check this out: In base 2 take all (or the first several hundred thousand) the odd numbers and figure out the mirror image of the bit string for each number. Ex: mirror of 11111 is 11111 mirror of 1011101 is 1011101 mirror of 100000001111 is 111100000001 You can't really mirror an even number...

OK, so this isn't anything I've ever done before and would like some input on feasibility, and whatever else you can throw at me. I'm examining images (of atmosphere with a storm structure building up) but unfortunately the data that is available (i.e. the data I've got to use) has quite...

Homework Statement The object in Figure P23.50 is midway between the lens and the mirror. The mirror's radius of curvature is 20.4 cm, and the lens has a focal length of -16.9 cm. http://www.webassign.net/sf5/p23_54.gif Figure P23.50 A. Considering only the light that leaves the object...

Homework Statement A transparent photographic slide is placed in front of a converging lens with a focal length of 2.44 cm. The lens forms an image of the slide 13.2 cm from the slide. How far is the lens from the slide if the image is virtual? nearer possible distance = Homework...

The inverse image of a function, and the image of the inverse of a function is written in the same way right? It is so confusing. Are there any better ways to write such stuff?

Let's say I want to use four separate images as a single figure with four parts (A, B, C and D, respectively). I could use a graphics tool and create one figure from those four images. However, I am wondering if there is a convenient way to simply put the four images together as a single...

Rays from the sun subtend an angle theta (in radians) at the pole of a convex mirror (in radians) at the pole of a mirror of focal length f. If the diameter of the sun is D ,then diameter of the image of the sun formed by the mirror is: (a) f theta (b) 2 f theta (c) 6 f theta (d) none...

Homework Statement An object and a screen are separated by 20 cm. A convex lens is placed between them, 5 cm from the object. In this position it causes a sharp image of the object to form on the screen. What is the focal length of the lens? The Attempt at a Solution wouldn't it just...

Homework Statement Two converging lenses with focal lengths of 40 cm and 20 cm are 10 cm apart. A 2.0-cm-tall object is 60 cm in front of the 40-cm-focal-length converging lens. a. Use ray tracing to find the position and height of the image. do this accurately with a ruler. Determine the...

Hey guys, I was wondering if anyone knows of an open source solution for reading in a black and white image and converting it to text (preferably in a text file)? I've tried Google, but I could only find online generators. Thanks.

HI I don't understand the method of image. I have this problem: A uniform charged disk is suspended ( at a distance h) above an infinite conducting plane ( disk is parallel to the plane). The disk carries a charge Q and has a diameter d. Assume d>>h. 1- Calculate the electric field vector...

I Need the explanation of "The image of formation of black hole" Please Explain Me This

1. The radius of Earth is 6.40 x 10³ km. The moon is about 3.84 x 10^5 km away from Earth and has a diameter of 3475 km. The Pacific Ocean surface, which can be considered a convex mirror, forms a virtual image of the moon. What is the diameter of that image?2. 1/p + 1/q = 1/f M = h'/h = -q/p...

I've got a sequence of pictures from my camera of some very distant buildings (~20mi) that I'd like to digitally enhance. I took about 20 shots in rapid succession in the hopes that I can combine them to produce a better image. My first attempt will simply be to overlay them in PhotoShop and...

I can see a small, capitalised "S" and "A" in the header image. Anyone know what they might stand for...?

Hi. I included a pic with the diagrams of a mirror problem. Blue line is the object, black is image. Now, to the problem. I know that if I stand at position A, I will see the object and the image because they're both in front of me. Also because there's a picture in the book (candle pic...

Homework Statement I'm making a program in C++ to take an image in .ppm format and either create its inverse or binary threshold. 2. The attempt at a solution #include <iostream> #include <fstream> #include <cmath> #include <cstdlib> //for exit() #include <string> #include...

Homework Statement An object is placed 6 metres from a convex lens of focal length 30cm. A concave lens of focal length 5cm is then placed 20 cm from the concave lens, on the side distant from the object. Determine the position, magnification and nature of the final image formed (to solve...

Homework Statement The image formed by a convex mirror is only one third the size of the object. Focal length=12cm. Find distance of image from the mirror. Please provide me with the equation of this problem. Please!

These guys are storing whole images using a single photon! http://www.sciencedaily.com/releases/2007/01/070119094254.htm I didn't think too much of the article until I read how they're doing it. It is pretty much living, breathing proof of QM's basic, weirdest principle. "To produce the...