Optics Definition and 999 Threads

Homework Statement Two converging lenses, each of focal length 15 cm, are placed 20 cm apart, and an object is placed 30 cm in front of the first. Where is the final image formed and what is the magnification of the system? Homework Equations Mtot = M1 * M2 (1/f) = 1/do + 1/di The Attempt at...

Firsts of this is not my problem I don't even take physics but it is my girlfriends. She doesn't know how to get the answer an neither do I. I took some physics but not enough for this. 1. Homework Statement A sports photographer has a 160-mm-focal-length lens on his camera. The photographer...

Why a ray of light passing through the centre of curvature of a concave mirror,gets reflected along the same path?

Homework Statement I'm having a problem using the fresnel formulae for these two problems below: 1. Using Fresnel formulae and expression for the Poynting vector show that at the interface between two dielectrics in the absence of absorption R+T=1, where R – is reflectivity and T –...

Hi there, optical aberrations can be expressed by Zernike polynomials Vmn(ρ,θ). Now, for my simulations i am using software that takes 4 inputs for creating aberrations onto an optical flat: m,n,R,A m,n are the Zernike orders which is perfectly clear. For R,A the manual says: R: the radius A...

Hi! It's my first time to register in this site but I've been reading threads here since a long time now. I'm a freshman engineering undergraduate student whose enthusiasm for this field of science is high, especially for optics. I really enjoyed our light box activity in my high school days...

hello forum, I have read about SONET which seems to be a physical layer protocol to transport data over fiber optics. SONET is a TDM (time division multiplexing method). TDM means that that time divided into slots and shared between different users. For example, given three users A, B and C...

I am learning nonlinear optics and recently got my hand on Nonlinear Optics by Robert W Boyd. Any other suggestions? Also is there a solution manual available for the above textbook? http://www.sciencedirect.com/science/book/9780123694706

I'm working on a project which will involve placing a superluminescent diode in a rocket, which will get launched in desert (obviously the SLD is just part of a greater system, the objective is not the operation of an SLD) What I need to know is if you think I could make, or where I can track...

Hello! If one were to push uncollimated light through a tube of inner radius R and length L, coated with matte black - the maximum incidence angle it will allow through would be ATAN2(R, L). On the other end of the tube, only the "most collimated" fraction of light would exit - a very small...

Hello! In this previous post, most replies point out that it is not possible to predict the angle of refraction (and so the frequency) at a certain interface, given the wavelength of the original signal. In particular, But when dealing with optical waveguides, it seems to be different. I am...

Guys Just wanted to clarify one doubt When we consider image formation by objects We always assume there's a source of light present ,right?(because all real-point and extended objects can't always be luminous ) we also know that it's diffused reflection of light or scattering of incident light...

Hello there! I'm new on the forum and english is not my first language. I'm working on an art project and I wonder if there's any mean by which I can transport the light from an illuminated scene across a small tube (let say not larger than 5 cm in diameter) and over some distance (let say 2...

I'm reading Hecht's book on optics and am absolutely hating it. The derivations are not rigorous and have many, many holes. They use unnecessary presentations (no div-grad-curl presentation of M's equations and instead writing out each of the 100 derivatives involved explicitly). Horrible book...

This is a simple and fun experiment in optics for high school and intro college. Might even be a good incentive to get student to learn how to use a micrometer.

Homework Statement An unpolarised light beam is shone horizontally through a cubic tank filled with weakly scattering fluid. Can vertically polarized light leave through the sides that are parallel to the beam’s propagation direction? Homework EquationsThe Attempt at a Solution My thinking is...

I am simulating a radio telescope and confused on what kind of source should I setup to simulate a star. Should it be a TEM00 gaussian beam or simply a plane wave?Cheers, Robin

An object is within a glass sphere of radius R with a refractive index of 1.5 . I'm trying to calculate the displacement of the virtual object relative to the actual when viewed from the side, such that the refracted ray emanating from the object becomes horizontal. I would like to know S (the...

In literature, I read:"(exposed in a beam of light) in floquet theory, the quasi-static eigenvalue spectrum at finite driving field A shows copies of the original bands shifted by integer multiples of ##\Omega##, the so-called Floquet sidebands" I have read something about floquet theory and...

I am reading the book "A History Of Optics" by Oliver Darrigol, and I came across this sentence (under the heading Visual Fire): Isn't this a low-quality argument? This can be directly disproved by the fact that humans inbabilty to see in dark, viz. if humans can see things from the "fire"...

Hello everyone, i am simulating a Michelson interferometer, where one mirror is slightly tilted, see picture.. This results in circular arcs / hyperbolic cross-section fringes. The center of these fringes depends on the focal length i am using, see picture. Is there an analytical expression for...

interference is a superposition of two waves coming two slits... diffraction is a superposition of a family of waves from a single slit.. then how the fringes formed during double slit experiment is actually a superposition of single-slit diffraction from each slit and the double-slit...

Took this image of the moon a couple of days ago. It shows the 22° halo and if you squint and imagine, part of the paraselenic circle. for more info: http://www.atoptics.co.uk/halo/common.htm

Homework Statement [/B] The textbook is talking about pulse spreading/dispersion in optical fibres. Book says: "The spreading of the pulse is due to two dispersion effects: (i) Chromatic dispersion occurs because the refractive index of the fibre is different for different frequencies...

I want to know the relationship between the optical axis direction of a crystal and the dielectric constants in different directions in an anisotropic material.

I'm halfway through my junior year and I'm hoping to do Quantum Optics or Particle Physics in graduate school (I'm doing the recommended courses for both since I'm still undecided). Besides the math required from the physics major (ie. Calculus, linear algebra, ODEs, PDEs, complex analysis)...

Hey everyone! I was wondering what the job prospects in academia and outside academia were like for people who have a physics Ph.D's specializing in optics? Were there a good number of STEM related choices or was it just as difficult as any other speciality? Thanks!

Hi, Concerning optical polarization, what is the Jones Matrix of a mirror at a non-zero angle of incidence with respect to incoming light? For a mirror at normal incidence the matrix is (1 0; 0 -1); How do I incorporate the angle?

Using a high-power LED light (the surface mount kind, about 4x4mm with 120 degree viewing angle) I'd like to project shadows of a fine metal mesh onto a wall. I have tried various lens arrangements and found that placing a pinhole in front of the LED makes the sharpest shadows. This makes...

I am currently studying optical microscope and discover that the axial resolution is limited as r(z) = 2pi / (NA)^2. However, while I got hints that it is due to the Rayleigh's limit, I can't derivative the equation using numerical method. It would be huge thanks if anyone can help me on the...

Homework Statement A beam of wavelength 600 nm has initially an intensity profile of Gaussian shape with a fwhm of 1 mm. Determine the intensity profile and fwhm 10 meter away.Homework Equations FWHM = λ/(2NA√(1 + I/Is)) The Attempt at a Solution [/B] FWHM1 = 1mm = 600 nm/(2NA√(1 + I/Is))...

Homework Statement We look at the center of one face of a solid cube of glass on a line of sight making 55° with the normal to the cube face. What is the minimum refractive index of glass for which you will see through the opposite face of the cube? (Hint: see through will be possible if the...

Homework Statement You are designing a thin transparent reflective coating for the front surface of a sheet of glass. The index of refraction of the glass is 1.52 and when it is in use, the coated glass has air on both sides. Because the coating is expensive, you want to use a layer that has...

Hello everyone. I have been practicing for my exam in fiber optics, and stumbled upon the following question: We have a transmission system with 3 channels, composed of a single mode fiber and a dispersion compensation fiber. Specifications are given for each. We need to calculate the channel's...

Homework Statement 2. Homework Equations F-number is f/d x0 = 1.2λ(fnumber) The Attempt at a Solution [/B] Fnumber1 = 0.2 Fnumber2 = 0.6 x01 = 180nm x02 = 540nmThese values seem large for depth resolution, is this correct?

Hi, it is known that second order correlation function (g2) is a constant( =1) for ideal laser or single frequency light sources. So, what is the second order correlation function for non ideal laser? Is it still a constant or something related to the coherence time of the laser?

There is a recent article (Optics July 2015) claiming violation of Bell inequalities for classical fields: "Shifting the quantum-classical boundary: theory and experiment for statistically classical optical fields" https://www.osapublishing.org/optica/abstract.cfm?URI=optica-2-7-611...

Hi everyone, There is a b&h Time-Correlated Single Photon Counting (tcspc, spc-130) in our lab, and I use it for coincidence of spdc in quantum optics. Actually I know some about how it work, but when it comes to parameter setting of the software I know nothing. Recently, I read some paper...

Hey there, What would happen if I had a half-wave plate, and I rotated it at like 1 Hz? If I stick a linear polarizer on the other end, what would my outcoming beam look like if the incoming one was natural light?

Hello. I am not related to physics or any optics related field. I am in need of equation for +20d aspherical lens of diameter 55mm. Can anybody help me?

I want to practice my problem solving skills on waves(and optics) so, I would like to have a good problems book about waves(not a book containing problems-nearly every book contains problems- but a book that is all about the problems). I am looking for a book which has exercises that offer...

what does it mean by localisation of fringes?

What would be the position an image formed by a Lens or a mirror if the object is not kept on the principal axis?

Hi I want to calculate the necessary incident polarization of a light beam at a given angle of incidence (theta_i) that reflects off BK7 glass (n = 1.5168) and is linearly polarized (i.e., 45 degrees). I know how to do similar calculations for incident natural unpolarized light, but not in the...

Hi according to Huygens principle every point on the wave front acts as a spherical source. so if a we emit monochromatic light on a screen without passing light from grating, we should see interference pattern but we don't. why don't these spherical waves interfere with each other? is this...

Homework Statement An equiconvex lens having spherical surfaces of radius 10cm, a central thickness of 2cm, and a refractive index of 1.61 is situated between air and water (n=1.33). An object 5cm high is placed 60cm in front of the lens surface. Find the cardinal points for the lens and the...

" Thus according to Maxwell, light waves are associated with changing electric and magnetic fields; changing electric field produces a time and space varying magnetic field and a changing magnetic field produces a time and space varying electric field. The changing electric and magnetic fields...

I'm a high school senior taking classes at Ohio State University. I'm currently enrolled in Basic Astrophysics and Planetary Astronomy, and have already decided to take Stellar, Galactic, & Extragalactic Astronomy & Astrophysics (wow that is LONG!) next semester. I've been looking at other...

Homework Statement A light source consists of two long thin parallel wires, separated by a distance, W. A current is passed through the wires so that they emit light thermally. A filter is placed in front of the wires to only allow a narrow spectral range, centred at λ to propagate to a...

In most (perhaps all) books it was mentioned that intersection of the light from the object when reflected by the mirror or refracted by a lens intersect at a particular point. That point when traced till the principal axis gives the image. (Provided object lies on the axis). I do not understand...