tracing Definition and 85 Threads

  1. N

    Tracing Serial EEPROM Pins on a Populated PCB

    Hello, I have a simple populated PCB with passive and active elements. The main chip on PCB is a 8 pin serial EEPROM chip which I am trying to read via PIC microcontroller. Serial chip is tiny and hard to solder wires onto so I can send signals from PIC controller to the chip. I will have...
  2. J

    How Do Light Rays Travel from A to B via Refraction or Reflection?

    Homework Statement The directions state that you "must trace the light rays that would travel from A to B via refraction or reflection. Show what angle must be equal to what. Why does light take the path you charted Homework Equations The Attempt at a Solution I have provided...
  3. A

    Ray Tracing and Lens Formula for Image Location

    Homework Statement An object is locted 15cm infront of a convae lends with a focal length of 10cm. use ray tracing to determine the location of the image. try to draw to scale i)is the image upright or inverted? ii)is the image real or virtual? iii)use your ray-tracing diagram to...
  4. S

    Ray Tracing with Diverging and Converging Lenses: A Quick Guide

    If I have an object and in front of it there's a diverging lens, and in front of that (furthest from the object) there's a converging lens can I just ignore the diverging lens when ray tracing for the image formed by the converging lens? I figure if I were able to draw an infinite number of...
  5. R

    Ray diagrams for mirror ray tracing

    Just a check here... I'm doing some ray diagram practice for optics and I've hit a road block. Hyperphysics is stating that for a concave mirror o is usually negative due to it measured against the direction of light propagation when applied to the mirror equation (below)...
  6. C

    Mathematica Tracing a point on a graph and displaying the y value - Mathematica

    Hey, I am using Mathematica 8 and I finally figured out how to drag a point along a graph using a slider bar, which increases or decreases the x value. Now, I am stuck on how to display the y value for the changing x value on the screen. My code is below: parabola = Plot[x^2, {x, -4, 4}...
  7. F

    Tracing the Light Path of a Green Laser Pointer

    How is it possible to see the light path of a green laser pointer?
  8. J

    Graph z=f(x,y): Tracing the x-axis, y-axis, and Lines

    Homework Statement Sketch the indicated traces, and the graph z = f(x,y) f(x,y) = x - 2y z = 0; z = 1; x = 0; y = 0The Attempt at a Solution z = f(x,y) = 0 = x - 2y -> y = -x/2 the trace is a line z = f(x,y) = 1 = x - 2y -> y = x-1/2 another line going through x = 1/2 z =...
  9. Cyrus

    News Iraq War Sanctions: Tracing Money and Oil

    Im having a discussion with someone about sanctions leading up to the war in Iraq. I was wondering if anyone could give me a source which shows where the money went in that program (corruption), and what country the Iraqi oil went to.
  10. N

    Intersection test for ray tracing

    I know that intersection tests can typically (for hit detection in games) be computed in log n time with reasonable accuracy, but there is a problem that I see with using hierarchical bounding volumes in ray tracing. For example, a ray may intersect a bounding volume however due to the shape...
  11. K

    Ray Tracing Rules: Concave & Convex Lenses & Mirrors

    Can anyone brief of on the different rules for doing ray tracing for both concave and convex lenses, as well as both concave and convex mirrors?? I understand the concepts but i can't seem to keep ray tracing in my head from the way our textbook explains it...
  12. C

    What is the Ray Tracing Diagram for a Concave Lens with f < do < R?

    Homework Statement I have a concave lens where f < do < R. I have to provide a ray tracing diagram. The Attempt at a Solution I drew the focal ray through the focus and parallel to the principal axis. I drew the principal ray parallel to the principal axis then through the focus. I...
  13. P

    Tracing the Path of Oxygen/CO2/Water through Plants

    Homework Statement Trace the path of oxygen/carbon dioxide/water through the plant or some part of the plant indicate all the structures and or cell types that the molecule passes and their functions Homework Equations N/A The Attempt at a Solution Well carbon dioxide passes...
  14. B

    Ray Tracing and Image Formation with a Concave Lens

    Homework Statement If the focal length of the concave lens is -7.50 cm, at what distance d_o from the lens should an object be placed so that its image is formed 3.70 cm from the lens? What is the magnification m produced by the concave lens described in above? Where should the object be...
  15. L

    Solving COMSOL Particle Tracing Problem with Boundary Coordinates

    Hello all, I have a small problem with COMSOL. I am trying to use the particle tracing feature, more precisely I want to use the boundary coordinates to specify where are the points from which to trace the electrons. From what I understand in the User's Giude, the Boundary Coordinates feature...
  16. D

    Tracing a computers previous logged on locations

    If i found a computer on the street and it had no information on the owner or previous user, is it possible to to then find and locate where it had been used and thus a possible owner?
  17. B

    1st year student: Tracing a program by hand

    Hey, new to the forum. I'm currently taking my first programming course, and in one of the assignments, I was asked to trace the following Fortran77 program fragment by hand and determine the final values for n and m: integer n, m, k, j n = 0 m = 0 do k = 1, 3 do j = k, 1, -1...
  18. J

    Use ray tracing to determine the location of the image

    Homework Statement An object is 6.0 cm in front of a converging lens with a focal length of 10 cm. Use ray tracing to determine the location of the image. Is the image upright or inverted? Is it real or virtual? The Attempt at a Solution According to my ray tracing...there is no...
  19. W

    [Ray Tracing] Wavefronts & Reception Sphere

    Hi all, I'm confused about the concept of wavefronts in ray tracing .. each ray is considered a wavefront? or what exactly is a wavefront in ray tracing? In the reception sphere, it is mentioned that only one ray should be received from an actual path. I don't get it .. does this mean that...
  20. M

    Tracing the Passage of Time: Is It Possible?

    does every second repeat itself when time moves forward,but the events that occur in each second are not the same,so do we know the no.of seconds that have passed from the time life began?
  21. W

    [Ray tracing] Resultant of electric field components

    Hi All, I am a beginner at Electromagnetics I'm implementing ray tracing SBR to predict propagation of waves. Each ray contribution will be in the form of: Ei = (some factors) e ^ (- j k r) u(theta, phi) where k = 2 pi / wavelength, r is the total unfolded path I'm not sure about...
  22. L

    Partial Tracing Techniques for Fermionic Partition Functions

    Hi there! Up to now, I've been not so familiar with theoretical condensed matter physics but now I have to calculate a partition function of the type Z = \mathrm{Tr}\,\mathrm{e}^{-\beta(a^\dagger a + a^\dagger b + ab^\dagger)} where a, a^\dagger, b, b^\dagger are fermionic...
  23. E

    Optical Ray Tracing - "Y N U" Method & Aperture Stops

    Is anyone familiar with the "y n u" ray trace method for optical systems, using paraxial rays where Snell's law is approximated using: n1sinx1 ≈ n1tanx1 ≈ n1u1 = n2u2 If anyone is familiar with this, I'd be interested to discuss the finer points of "a-ray" and "b-ray" tracing, as well...
  24. T

    How to organise the tracing of this recursion

    i tried to trace this recurtion for small numbers but i don't know how to write down in an organized way int a(int n,int count){ int i; for(i=0;i<n;i++) count =a(i,count); return count+1; } a(0,0) is easy its 1 a(1,0) a little harder it returns 2 but when i get...
  25. B

    How Does Ray Tracing with Multi-Lens Systems Work?

    Multi-Lens System Ray Tracing --Please help Homework Statement It isn't possible to form an image of a real object on a screen with only diverging lens. However, if we use a converging lens, it is possible to create what is called a virtual object. The diverging lens has a virtual object...
  26. C

    Tracing a Seat's Position on a Ferris Wheel

    The motion diagram below shows the position of a seat on a Ferris wheel at 12 moments. One full rotation is shown; the positions at moments 0 and 6 are labelled. For each of the following questions, choose the appropriate direction from the second diagram...
  27. B

    Solve Ray Tracing Problem: Image Location for 6.3 cm from Convex Mirror

    Ray Tracing...HELP! Homework Statement An object is 6.3 cm from a convex mirror with a focal length of 10 cm. Use ray tracing to determine the location of its image. Homework Equations The Attempt at a Solution 1/f = 1/s + 1/s' 1/f - 1/s = 1/s' 1/10 - 1/6.3 = -0.0587 cm ^ -1 =...
  28. H

    Ray Tracing Box Intersection: (3,8) to (6,-1), (-2,3), and i-5j

    Ok, so this is probably a really basic question, and I've got a feeling that my brain is just too 'fuzzy' just now and that all my problem is is simple arithmetic, but here it goes... 1. Determine whether or not the box with vertices at (2,1), (5,1), (5,5), and (2,5) is intersected by the...
  29. J

    Tracing the path of hydrogen atoms after the ingestion of glucose.

    After ingestion of glucose, trace the path of the hydrogen atoms in glucose beginning within the digestive tract and ending with the oxidation of the glucose during aerobic respiration. Can anyone help me out with this problem? Thanks to everyone in advance!
  30. Amith2006

    Tracing the U(235,92) + Neutron Process to Final Stable Nuclei

    Homework Statement 1) In a sequential process, U(235,92) plus a neutron forms the compound nucleus [U(236,92)]* which then fissions; the fissions then produces decays. If the initial fission fragments are Ba(143,56) and Kr(90,36), illustrate a process leading to the final stable nuclei...
  31. A

    Tracing the Roots of Nuclear Physics: Experiments by Early Pioneers

    Where can all the classic papers by the experimentalists that layed the foundation for nuclear physics be found?:confused: Rutherford, joliot-curie, fermi, lawrence, Hahn ect. Im very interested in reading exactly how they setup there experiments, the conclusions they drew and so on.
  32. L

    How Fundamental Is General Relativity in Understanding Black Holes?

    Dear all, The possibility of black holes can be traced back to a special solution of the Einstein's equations, the famous Schwarzschild metric in 1916. I find this very impressive, since at that time, the GR was a very young theory and it would have been more than natural to be skeptic...
  33. Z

    Trace IP Address: How Accurate & What Info?

    how do you trace an ip address? I'm not looking for anyone's exact location.. just mainly city/state/country and how accurate can it be
  34. Z

    Tracing and threats on messengers

    I recently received a threatening message in my yahoo messenger from someone I do not know... is it possible for someone to be able to trace my telephone no. and address etc. this way? They say they have... if so, can theirs be traced from my end as well to find out who this is? shaken
  35. frankR

    How Do Matrices Help in Ray Tracing a Scratched Glass Sphere?

    Here is the problem: A glass sphere with a diameter of 5cm has a scratch on its surface. When the scratch is viewed through the glass from a position directly opposite, where is the virtual image of the scratch, and its magnification? The glass has an index of refraction n=1.50. Explain the...
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