Diffraction Definition and 1000 Threads

Homework Statement A Fabry-Perot interferometer consists of two parallel half-silvered mirrors separated by a small distance a. Show that when light is incident on the interferometer with an angle of incidence \theta, the transmitted light will have maximum intensity when a = (\frac{m \cdot...

[b]1. Explain the physical principles of the production of spectra by diffraction gratings. include production of zero, first and second order spectrum. Homework Equations The Attempt at a Solution Diffraction and interference?

How can we decide which process is causing light to bend near the surface of a star? Gravity is said to cause light to bend or deflect as it passes near the huge mass of a star. But matter in the troposphere of a star should also cause light to bend or deflect as it passes through the...

Diffraction of light and orders equation?? Homework Statement A particular grating has slits of width 600nm and a slit separation of 1800nm. Will there be any missing orders if this is used to observe a line spectrum consisting of 450nm, 600nm and 650nm? Homework Equations I'm not...

[SOLVED] Single-Slit Diffraction Homework Statement You have been asked to measure the width of a slit in a piece of paper. You mount the paper 80.0 centimeters from a screen and illuminate it from behind with laser light of wavelength 633 nanometers (in air). You mark two of the intensity...

[SOLVED] Easy question on diffraction of light please help! Homework Statement Wavelengths are; 1 - 520nm Wavelength 2 - 520.8nm Diffraction grating - 400 lines per mm How many orders will the lines be seen in? Homework Equations N = dsin0/lamda The Attempt at a Solution d =...

Homework Statement How many orders of diffraction will be visible if light of wavelength 500nm fals on a grating with 600 000 lines per metre? Homework Equations n = dsinѲ / λ The Attempt at a Solution n = 6X10⁵m ÷ 5 X 10ˉ⁷m = 1.2 So 1 order of diffraction will be visible is...

You find two unlabelled diffraction gratings in your lab. From purchase records, you know that one grating has 5000 lines/cm, while the other has 10 000 lines/cm. Given the following equipment, describe how you would determine which is the grating with 10 000 lines/cm: • Red laser • detection...

Homework Statement http://img73.imageshack.us/img73/2750/physicsnm5.jpg Homework Equations asinO=m(wavelength) The Attempt at a Solution I don't really know where to start...

1. The problem A HeNe laser (wavelength = 633nm) is used to illuminate an opaque plate containing a a specified aperture. The light which passes through the aperture falls on a screen at a distance of 4 m from the aperture plate. c) The aperture is replaced by two long rectangular slits...

1. I am attempting a question from a textbook but the wording or perhaps the question itself is confusing me. *Light falls at perpendicular incidence on a transmission diffraction grating. The second order diffracted light leaving the grating is examined. The grating has 600 slits per mm, a...

My lecturer has given me this formula for reflective diffraction m landa = d (cos a - cos b) where m is order # landa is wavelength d is slit seperation a is angle of inicdence b is angle of reflection The problem I have is I wasn't given any justification of this and have...

I'm trying to calculate the uncertainty in momentum/direction resulting purely from the certainty in position caused by a small slit, as a function of the slit width. Can anyone tell me if I'm doing this right? Starting with the HUP: dX * dP >= h/4pi dX = the slit width w P = h/lambda...

# of diffraction orders seen? Homework Statement A 513 line/mm diffraction grating is illuminated by light of wavelength 567 nm. How many diffraction orders are seen? Homework Equations The Attempt at a Solution d*sin theta = mt t = wavelength m = d*sin theta/t I don't have...

[SOLVED] light diffraction in plasma This is my first post in that forum and I hope someone will help me.:redface: It is known that photons with frequency lower than the natural oscillation frequency of plasma are reflected , but those photons with slightly lower frequencies are they fully...

Homework Statement My book uses the following equation to derive the diffraction condition for electromagnetic waves scattering in a crystal lattice: F= \int dV n(\mathbf{r}) \exp \left[i\Delta\mathbf{k}\cdot \mathbf{r} \right] F is the scattering amplitude and n is the electron density. I...

Homework Statement Why a grating is prefferes over a single slit for obtaining diffraction pattern ? Homework Equations The Attempt at a Solution

What describes Airy equation in theoretical description of light diffraction?

light wavelengths of 520nm and 630nm passes through a diffraction grating that contains 6000lines/cm. a) sketch a diagram of the image produced from m=0 to m=2. label the order of each fringe.b) calculate the angles for the first and second-order maxima that would appear on the screen. c) What...

light wavelengths of 520nm and 630nm passes through a diffraction grating that contains 6000lines/cm. a) sketch a diagram of the image produced from m=0 to m=2. label the order of each fringe.b) calculate the angles for the first and second-order maxima that would appear on the screen. c) What...

Not sure if this is the right forum for this but I am analysing the data for the diffraction experiment I have just done (laser source at two slit diffraction grating) and have got the graph (similar to this http://www.physics.umd.edu/courses/Phys273/williams06/TwoSlit.jpg" ). However all the...

I am to give my first physics talk for a seminar class next week and I am looking for info on recent research done on the reverse diffraction phenomenon. Any links or thoughts would be appreciated. (Credible sources only please, as this is for a class).

hi everybody. I have a problem in finding the width of central maximum in a single slit diffraction pattern. theoritically, we say it is the distance between the two first minima on either sides of the central maxima. i feel this calculation leads to the width of central maxima+half minima on...

I know the scalar theory of light, which doesn't include polarization effects. I was taught it is quite accurate when the subject is bigger then the wavelength. But today, someone told me that by using half plates and quarter plates in an optical setup with polarized light he can transfer...

[SOLVED] Diffraction homework help Homework Statement calculate d for a diffraction grating with 600 lines/mm. Homework Equations mwavelength / d = x/ L The Attempt at a Solution well i really don't know what to solve for because i thought the diffraction grating is d.

What is geometrical shadow qualitatively? please don't refer me to hyper physics

Heya! I'm new in the forum, and here is my first entry. I don't really understand the diagram for wave difraction. Let me try to draw it... | | | | | The space between the four three lines is suppose to be the wavelength. | | | | | | | | | | The last line is suppose to...

Diffraction pattern?? This isn't a homework problem, but something I noticed and would like to understand. Hopefully I have posted this in the right area: I have a window that faces west. The other day I noticed a perfectly circular patch of light (several inches in diameter) on the wall...

Firstly, after thinking wether this should go in the Homework and Coursework section, I can to the conclusion, that was not the right place, as I am just wanting to expand on what I have done in a lesson. Well, firstly we just touched on it, and I didn't really get the concept. I know that it...

[SOLVED] Diffraction Grating Homework Statement Find the number of slits per centimeter of a grating designed to disperse the first-order visible spectrum through an angular range of 15.0. Find also the angles at which the first-order visible spectrum begins and ends. Homework...

[SOLVED] Optics - Diffraction Hi. I was given an extra credit problem in class to derive equations related to multiple slit diffraction. I was wondering if someone wouldn't mind looking over what I have so far, and pointing me in the next direction. Thank you! Homework Statement Homework...

Homework Statement Interesting Problem... monochromatic light of wavelength \lambda falls on a slit and is transmitted as t=1 for 0<x<(d/2) t=-1 for (-d/2)<x<0 t=0 otherwise... Define \ w =\ k(d/2) \sin\theta...[most possibly,if I can exactly remember...] Now what should be the...

Do higher wavelength radiation have more pronounced diffraction effects than low wavelength radiation, and why is that?

urgent Help with single slit diffraction (fraunhoffer) why is it a minimum at a*sin (\theta) = m*\lambda, a = slit separation I would have thought if the path difference is equal to a whole wavelength then there would be constructive interference?? See...

Homework Statement A scientist needs to focus a helium-neon laser beam (lamda = 633nm) to a 10 micrometre diameter spot 8.0 cm behind the lens. a) What focal-length should she use? b) What minimum diameter should she use? Homework Equations w = (2.44lambda * focal length) /...

Why( and how) does the intensity of the wave vary along a screen perpendicular to the optical axis?

Homework Statement I am to show that quantum effects are negligible in: (i) The diffraction of a tennis ball of mass m=0.1 kg moving at a speed of 0.5 m/s by a window of size 1X1.5 m^2 (ii)The tunneling probability for a marble of mass m=5 g moving at a speed of 10 cm/s against a...

can someone explain me why single-slit diffraction occurs in terms of the electromagnetic interpretaition of light

According to my knowledge, the position of the dark fringes is given by asin(x)=m*lamda (sorry, I do not know how to type equations in here) tan(x)=d/L a=slit width x=angle of diffraction(?) m=no. of order d=distance from the central fringe L=distance between...

In single slit diffraction, my professor says that only 2 rays get diffracted. Both at the 2 ends of the slit. no other rays are diffracted. Is this true??:confused: What i think is all rays in the slit get diffracted and not only the 2 rays at the 2 ends of the slit.

hey during proof of expression of double slit interference at a point ,we take into account the interference due to 2 light rays emerging from 2 different slits. here why don't we account for the the interference also due to to light rays emerging from the same slit as in the single slit...

The standard explanation for diffraction patterns from a single slit employs Huygens Principle and the production of secondary wavelets to form a new 'front'. These fronts reinforce constructively and destructively to produce the pattern. But...if you consider an infinite number of points...

Hello, I just read about the the ten most beautiful experiments of all times. The top winner was the double slit diffraction by electrons experience carried out by Claus Jönsson . This electron diffraction experiment, I think, has been chosen as remarquable because it stages the...

I'm doing an A level past paper for physics and there's a diagram involved which I can't put on here but here is the link: http://www.egsphysics.co.uk/files/web_pages/exams.html It is the June 2004 paper unit 4 question 1. The question is asking for the path difference between two...

Could anyone explain why it is that as more slits are added the fringes appear sharper? Thanks

Q: Electrons are incident on a crystal which can be thought of as a series of reflecting planes with spacing d=0.074nm. What Kinetic Energy should the electrons be given in order that at least four diffracton maxima are observable? Attempt: The equations i think i have to use are nλ=2dsinθ...

Waves pass through a 10.-centimeter opening in a barrierr without being diffracted. This observation provides evidence that the wavelength of the waves is much shorter than 10. cm. This is a multiple-choice question, and this is not the question that I am asking. I want to use this as an example...

Two narrow slits of width a are separated by center-to-center distance d. Suppose that the ratio of d to a is an integer d/a=m. Show that in the diffraction patterns produced by this arrangement of slits, the mth interference maximum (corresponding to dsin(theta)=m\lambda) is suppressed because...

How to explain transmission, reflexion, refraction and diffraction at a atomic level. For example: 1 - how does light passes through a transparent material? 2 - what happens in the boundary of separation of two materials for light to be: partially reflected, partially refracted ad partially...

from what I've read .. I am supposed to learn that the silver lining which we see is due to e diffraction of light. but i don't understand how diffraction of light results in e particularly bright parts along e edge of the clouds. shouldn't e light waves spread out? such that it would also cover...