Optical Definition and 701 Threads

optical diple trap is used to trap spinor bec i have a question why are the three different atomic internal levels feel the same shift? To calculate the energy shift of a specific internal level, we need to find out the coupling between this level to higher levels. For different levels...

If I was to measure the transmission of light through a coated piece of glass(with a coating designed to scatter light). Do I expect the optical transmission to be different if the light is incident upon the coated side compared to if the light is incident on the uncoated side and exits through...

I did an experiment on the speed of light with different length of optical fibers. I know that the fiber has a refraction index of 1.49. I would like to know if I need to take in account the total internal reflection of the optical fibers too. Because when I use long fibers like for exemple...

From a classical perspective, linearly polarized light can be converted to circular by introducing a phase shift between the orthogonal modes. Could someone give me an explanation of how this works from a quantum mechanics perspective, starting from the fact that each photon has angular...

I've been wrestling with this problem for a while, and I really cannot understand it. As I understand it, the limit of the resolving power of the eye is related to diffraction: when Rayleigh's criterion is just satisfied, then two objects which are close together can just be resolved, i.e. we...

Homework Statement The glass core of an optical fiber has an index of refraction 1.62. The index of refraction of the cladding is 1.47. What is the maximum angle a light ray can make with the wall of the core if it is to remain inside the fiber? Homework Equations theta = sin ^-1...

In case of anisotropic medium the energy is flowing in a different direction with respect to the direction of light propagation .How can it possible ? If so,then in what form the energy is flowing ? How can I detect that energy is flowing in a different direction not the direction of light...

Hi everyone, I'm trying to work out all the intricate details of the limits involved in computing the integrals leading to the Optical Theorem in nonrelativistic Quantum Mechanics. In doing so, I have arrived at the following integrals which are to be evaluated in the r \rightarrow \infty...

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...

I want to ask how Schott and other glass makers develop their glasses for calibrated light transmittance ? How everything goes ? Is it a quantum physics science or a basic experimentation ? For example , why Leica worked alone to develop its own glass formulas ? For to make a reason to...

Hey guys sorry my first post is a help request and not an introduction or anything but I'd really appreciate a helping hand here Homework Statement Show that the extinction A(λ) and optical depth τ(λ) are related by the linear relationship A(λ)=1.086*τ(λ) Homework Equations...

Hi, Does anyone know any good Linux/Unix software for analysing optical emission spectra? I've been searching the net, but I can't find any. The software I'm currently using is old, only for MS Windows, very expensive, and pretty much useless. So any suggestions would be much appreciated...

Hie. I would like to know anyone who knows or have idea on design static and dynamic model for Semiconductor Optical Amplifier? Currently my lecturer ask me to design using Optisystem software which I quit blur on designing this models. Anyone who knows and help me please. Thanks in advanced..

Hello everybody, I currently have a degree in chemistry and I am working on another in physics. I plan on going to grad school when I finish the second degree. That will probably be in four years or so. I'm working full time for the next couple of years while taking classes and then I will...

I live in Tucson, AZ and I'm going to be going to the University of Arizona in a little bit, at the U of A there is an Optical Sciences and Engineering program (BS, MS, and PhD) that is supposed to be pretty good. I haven't been able to find anything online about majoring in Optics or being an...

Hi, could you explain me polarization dependence of SOA amplifiers. and how to transfer the transverse electric (TE) mode to transverse magnetic (TM) mode. Are there any passive components to do it?

http://img168.imageshack.us/img168/4228/testriguk1.jpg The back portion is a box. But depending on how you look at it, it becomes one of those boxes that is impossible to close without crossing itself. Its an optical illusion, that I made out of pure luck! I showed it to someone and they...

Homework Statement An object is placed at 30 cm in front of a diverging lens with a focal length of 10 cm. What is the image distance? Homework Equations 1/f = 1/do + 1/di The Attempt at a Solution I thought this was a straight-forward question: 1/di = 1/-f - 1/do 1/di =...

Hi, Can anybody recommend a tutorial on how to use Zemax to perform simple optical system designs? I've been to Zemax's website and looked at its help section, but it doesn't really help at all. I've also checked out "Introduction to lens Design with Practical Zemax Examples" by Joseph M...

Hi, Can anybody recommend a tutorial on how to use Zemax to perform simple optical system designs? I've been to Zemax's website and looked at its help section, but it doesn't really help at all. I've also checked out "Introduction to Lens Design with Practical Zemax Examples" by Joseph M...

I am trying to figure out the optical slice thickness on a confocal laser scanning microscope with the following: Lambda exitation: 514 Lambda emmision: 548nm Pinhole: 2 AU / 222,9 um NA: 1,2 n (refraction index): 1,33 (W) I have tried a few equations, but they give quite different...

Homework Statement "Provide a true explanation for what you see as you look at a lightbulb underwater" (See the attached Image) What you see: Out of water -> white opaque light bulb Underwater -> clear outside, opaque white inside Homework Equations N/A The Attempt at a...

Hi optical engineers/physicists, I'm designing an optical sensor system, and it would be very beneficial if there was a method for determining the difference between two very close (down to tens of femtometers) optical wavelengths. The difference measured can be relative, although absolute...

Homework Statement Calculate the energy and radius for each of the five lowest (n = 1,2,3,4,5) electron orbits in a Helium atom with only one electron. Enter the energy as a positive value in units of "eV" and the radius in units of "nm". Hint: The Helium nucleus has 2 protons so Z = 2 and...

The sugar concentration in a solution can be measured conveniently by using the optical activity of sugar nad other asymmetric molecules. In general, an optically active molecule like sugar will rotate the plane of polarization through an angle that is proportional to the thickness of the sample...

Homework Statement I just want to know if there is a relationship between the ground state of Hydrogen which is 13.6 eV and the ground state of Helium. The problem is asking me to find the ground state of Helium, but I am not sure how to go about it. Any advice? Homework Equations...

Hi I was just wondering if it is possible to calculate the optical illusion. For example consider a barrier for the car park. It looks very long when it is vertical and upright but very small when it is horizontal. The illusion that we obtain when the barrier is vertical will make us assume that...

I have a few questions regarding the transfer function of a SMF. I'm using the below equation to simulate the effect a single mode fiber (SMF) has on the optical field after some distance \textit{z}. \begin{equation} S_{out}(\omega) = S_{in}(\omega)\exp\left...

Hi, I has a question about Optical effects of special relativity. I recently watching a video about this in You Tube, my question is: Ever wonder what the world would look like as a photon?

Homework Statement A multimode step index fiber has a relative index difference of 1% and a core refractive index of 1.5. The number of modes propagating at a wavelength of 1.3μm is 1100. Estimate the diameter of the fiber core. An optical link of 6 km uses the above fiber. Find (a) the...

Homework Statement when chiral 2-bromobutane reacts with aqueous hydroxide ions, the optical activity of the product is reversed. Suggest why the optical isomerism is reversed. The Attempt at a Solution i have no idea... but i don't know if the fact that the hydroxide ion will attack...

Hi, i have a question about optical fiber and CO2 laser Can a CO2 laser be cabled with optical fiber? Wavelength of 10 micron

http://www.picamatic.com/show/2008/08/13/02/806039_901x355.JPG This is not a 'question.' I'm just trying to understand what trick they pulled to get the 'distance of object from the mirror.' It's probably obvious to many, but not to me! Please help

What is it about an antenna that gives rise to a particular polarization? Can antennas have polarizers similar to the ones used in optical systems?

The problem: how to determine the optical density of a diluted sample Hi, i work on algae and bioenergy and i have a question about the OD. I have to determine the optical density of about 400 samples. Some samples however are too "dense" for the photospectrometer, that is they have an optical...

Hi.. My department is considering to purchase an Optical Spectrum Analyzer (OSA). I had run a search on GlobalSpec, but I am really getting confused over the hundreds of spectrum analyzers available. I am looking for a diffraction-grating based analyzer that covers a broad range of...

The Sun and Moon appear larger while near the horizon. The explanation I heard for this optical illusion is that when the Sun and Moon are near the horizon our brain(eyes) have something to reference their size to therefor making them appear larger. But which is their actual size? Is the size...

Hello everyone. I have some zirconium that is coated with 1nm of Ni. Now, here's the problem: I don't know if the coating is actually 1nm and have to find out. I don't have access to our AFM today, so I can't use that. But I do have light transmission data from the sample. i.e. I know...

Hello, I got some optical mouse sensors (ADNS-2620) with lenses and I had a couple of questions that hopefully someone can answer. 1) If I was to use the sensor in a setting where there was plenty of ambient light, would it be possible to use the sensor and the lens with no LED (this...

The way I understand it, it's not quite the real thing yet, but very interesting. Optical Camouflage video on YouTube There a short article http://transstudio.com/tm/2007/01/optical-camouflage.htm as well. So, what do you think?

At my location, the Sun's gross energy is .6kW/M2 with roughly 40% of that energy being IR. Now on to my question.. Why can't we collect, filter and collimate that IR to be used in laser cutting applications? I understand divergence will be an issue but if the divergence is filtered out...

[SOLVED] thin layer optical coatings Homework Statement a sheet of glass is coated with a 500nm thick layer of oil (n=1.42) a. for what visible wavelengths of light do the reflected waves interfere constructively? b. for what visible wavelengths of light do the reflected waves interfere...

I hope this is the right forum; if not, I apologize in advance. I'm working on a 3d face scanner project, where I have a camera and a DLP projector very close to each other. This wikipedia entry titled "Structured Light 3D Scanner" explains very well what I'm trying to do. Basically, I take a...

Hi all, Say I have an optical system consisting of a HeNe laser, rotating mirror and achromatic lens. The scenario is: 1. The laser beam propagates towards the rotating mirror. 2. Rotating mirror is mouted on motor axis with slightly oblique angle and the motor axis itself is creating an...

Hey, I am doing this physics project where we have to take pictures of various optical phenomena. I was wondering what kind of phenomena can be photographed easily. One thing I thought of was total internal reflection, but I'm pretty much stuck on everything else. I need two different kinds...

I really don't know how I can speak about the physics in optical illusions. basically all I need is just 3 images and to explain the physics behind it. Can anyone help?

Dear Friends, i had an exam today where i had to mark the answers on OMR answer sheets. But unfortunately in some answers i marked a bit out of the circle, will it lead to rejection

Hello I really want to know what the advantages and disadvantages of optical pyrometers are? Thanks a lot

Hi, I need help or any sudgestions with the next scenario - I'm designing a sensor for a wind wave tunnel - can be found in the google search using the key words 'wind wave flume' The sensor should give me the speed and frequency of the cappilary gravity waves created in the tunnel by a...

Homework Statement Derive the optical length of the incident light being reflected back to the surface of the lens with radius r1. Homework Equations i have assumed that the surfaces can be given as r^2 = y^2+z^2 there are 2 surfaces of the lens with radii r1 and r2 The Attempt at...