Width Definition and 267 Threads

Hello, new kid on the block here. I have read the rules and hereby present my question. My aim is to calculate the period of a transient DC magnetic field from a half sine wave magnetiser output into an air core wirewound coil. Coil Resistance : 14.66 mili ohms (derived using voltage drop...

hello I would like to know the frequency width of a decaying axion Lets say the axion has a mass of 10^-6 eV and it decays via the primakoff effect within a B field into one photon. Because there is only one photon in the final state I would assume that the photon frequency is quite narrow but...

Hi, I am trying to understand exactly how and why the lifetime, or decay rate, of an atomic level determines the spectral width of the transition to this level. Also I would like to understand why the natural lineshape is a Lorentzian. I am familiar with the vague explanations involving...

Homework Statement A single slit is illuminated with 630 nm light, and the resulting diffraction pattern is viewed on a screen 2.8 m away. If the linear distance between the first and second dark fringes of the pattern is 12 cm, what is the width of the slit? Homework Equations y=Ltan\theta W =...

Homework Statement A laser 632.8nm is sent through a single slit of widith 0.30 mm. Wats the width of the central maximum on a screen 1.0m in the back of the slit? Homework Equations asin(theta) = m lamda The Attempt at a Solution lamda: 632.8nm 0.30 mm= 3.0 x 10^-4 m...

Homework Statement http://www.geocities.com/asdfasdf23135/stat15.JPG I am OK with part a, but I am having some troubles with part b. Homework Equations Width of a Confidence Interval The Attempt at a Solution Attempt for part b: http://www.geocities.com/asdfasdf23135/stat16.JPG...

Homework Statement The central bright fringe in a single slit diffraction pattern from light of wavelength 412 nm is 1.9 cm wide on a screen that is 1.05 m from the slit. How wide is the slit? Homework Equations i keep trying the equation .5asintheta=.5wavelength I can't seem to...

A pulse 300ns long is made using a continuous wave laser and a very(very) fast shutter. What is (approx.) the minimum spectral width of the pulse? I have no idea where to start. For starters what is the spectral width? and how would i go about solving this problem. Not looking for a...

Hey what's the relationship between the width of emission lines and the uncertainty principle? My lecturer mentioned it briefly but didn't go into it. I think I get it but would have trouble explaining it. Cheers, nSlavingBlair

Homework Statement A mask with 2 slits is illuminated by a light of 589nm wavelength. Slits each have a 0.1mm width separated (centre to centre) by 3.0mm. Calculate the distance between adjacent bright fringes on the screen if a screen is placed 5.0m away from the slits. Homework...

Homework Statement Ramon has a coherent light source with wavelength 554 nm. He wishes to send light through a double slit with slit separation of 1.5 mm to a screen 90 cm away. What is the minimum width of the screen if Ramon wants to display five interference maxima? Homework...

We have been asked to make any circuit of our choice using op-amps on a breadboard or a PCB. We have found this circuit of PULSE WIDTH MODULATOR on the net and we have decided to go for it.But our teacher wants us to explain the designing of the circuit too namely why have we used the resiistors...

Homework Statement "A manufacturer of corrugated metal wants to produce metal roofing panels that are 28 in. wide and 2 in. thick by processing flat metal sheets." the illustration shows that by "2 in. thick" they are referring to the distance between the crest and valley of the sine wave...

Homework Statement In a church choir loft, two parallel walls are 4.98 m apart. The singers stand against the north wall. The organist faces the south wall, sitting 0.967 m away from it. So that she can see the choir, a flat mirror 0.855 m wide is mounted in the south wall, straight in front...

Hi, I want to know the technical name of the width of a graphic funcion. In the example I give at the bottom, the width of the function is painted by an arrow. Maybe the noun is amplitude? http://img528.imageshack.us/img528/8905/graphfh8.png Thanks with anticipation

Hi, I would like to measure black line width (width of 0.5 inch)with a robot. I don't know how to do it. I use a QRB1134 sensor and the Analog/digital converter. please can someone guide me on the procedure for this please? C.

Homework Statement a. How wide is the gap between tiles in centimeters? b. How wide is the gap in inches c. How many algae-thicknesses is the gap between tiles Homework Equations The Attempt at a Solution First off, I just want to know if I did a and b correctly. To set up...

I'm looking for a formula that will give me the surface length of a 3d object when intersected at a specific angle? For example if 1" wide object which is 14" long is at 90 degrees (i.e. vertical) to a line, it will be 1" wide when sitting on the line. It will be 14" wide when it is parallel...

Okay, so let's say we have a one-dimensional box of some width with a particle inside. If the particle is in an eigenstate of the energy, we know its energy exactly. Since the energy is purely kinetic, we also know its momentum. By the uncertainty principle, the position should be infinitely...

Is there a general dependence of some physical quantities for the decay width of any particles?

HINT! Parabola An arch is in the shape of a parabola with a vertical axis. The arch is 15 ft high at the center and the 40 ft wide at the base. At which height above the base is the width 20 ft? V(0,15) so my equation becomes: (x-0)^2=-4p(y-15)\rightarrow x^2=-4p(y-15) F(0,15-p) &...

Homework Statement The cross-section of a gutter can be represented by the quadratic: y=4/11x^2-4x+11 where x and y are measurements in cm. Calculate the width of the gutter where the depth is 6cms. Homework Equations The Attempt at a Solution my answer was 1.26cm or 12.6mm but...

Width of Slit...HeLP on setup Please! Homework Statement A helium-neon laser (λ=590 nm) illuminates a single slit and is observed on a screen 1.7 m behind the slit. The distance between the first and second minima in the diffraction pattern is 6.78 mm. What is the width (in mm) of the slit...

[SOLVED] Width of Aperture...please help! 1. Homework Statement A point source of light illuminates an aperture 2.3 m away. A 10.2-cm-wide bright patch of light appears on a screen 1.02 m behind the aperture. How wide is the aperture? 2. Homework Equations 3. The Attempt at a...

Width of Aperture...please help! Homework Statement A point source of light illuminates an aperture 2.3 m away. A 10.2-cm-wide bright patch of light appears on a screen 1.02 m behind the aperture. How wide is the aperture? Homework Equations The Attempt at a Solution I can't...

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...

Hi! I have been reading a bit about the J/psi resonance, and I was wondering about this thing: Its true width is relative very small, and all the diagrams I've seen are experimental and they state that the widht in the graph is not the true, but arises due to decetor resolution. I was...

So I'm in an intro quantum physics course, and while I'm sure this is a really simple problem, I'm just not getting the math to work out here. Say you excite the atoms of some gas such that they emit light at a wavelength of 5500 angstroms as they fall back to the ground state. Now if the...

Hiya, I have had to do an investigation on hookes law as part of my primary school teaching course. i am by far not the best at understanding physics. Can someone please explain to me what effect the width of a piece of elastic has on its elasticity and why? thanks

Hello! I know this is going to sound like a very basic question, but I'm working on a report about error analysis and I was wondering what width of distribution is.

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...

1. How should -2(125)^2 be calculated? *The title is inaccurate, sorry i changed my question.*

Homework Statement A strip of doped silicon 270 µm wide contains 9.1E22 conduction electrons per cubic meter and an insignificant number of holes. When the strip carries a current of 110 µA, the drift speed of the electrons is 44 cm/s. What is the thickness of the strip? Homework...

Hello All, I'm looking for a nifty chip that I can use to pro grammatically set the pulse width of a square wave signal in my circuit. The pulse width range I'm looking for is anywhere between 10 ns and 500 ns and so far, the only thing I have found is the DS1014 series ICs. They have the...

Based on the Michelson Morley experiment, Lorentz proposed already length contraction as an explanation of the negative outcome of the experiment. a) Did he also propose time dilation? b) How is width contraction ruled out: is that a necessary conclusion of the Michelson Morley experiment or...

anyone know how to find the spectral line width given the wavelength of the ejected photon, the energy values for the atom (usual hydrogen e values) and the lifetime in the excited state. any help much appriciated!# cheers all rob

How do you find the total width of the ellipse given by the equation 7x^2 + 7(y-6)^2 = 6.

I'm not exactly sure how to get started on this one. Can anybody help me?...Please? Two different single slits are used in an experiment involving one source of monochromatic light. With slit 1 in place, the first dark fringe is observed at an angle of 45 degrees. With slit 2, the first...

[Solved]Is a stats question,just need some clarity on it-"total width of less than 2. Homework Statement Hi.The result of a memory test is known to be normally distributed with mean mew and standard deviation 1.0. It's required to have a 95% confidence interval for mew with a total width of...

A third dimensional object has length, width and height. Taking a cross-section of this object anywhere along one dimension results in a two dimensional object, i.e. a line segment with length and width. A two dimensional object has length and width. Taking a cross section of this object...

What is the effect of increasing the width of a wire on it's resistance, and why? Thanks Neil

Homework Statement Hello everyone, I have one more problem left of my homework and I seemed to be stumped. I don't even know where to begin with this problem, which comes from the section of my book labeled Single-Slit Diffraction. Anyways, here is how the problem reads: Problem 22.18...

1. How many dark fringes will be produced on either side of the central maximum if light ( = 553 nm) is incident on a single slit that is 5.1 10-6 m wide? 2. sin theta = m (lamba/ W) lamba = wavelength W = slit width m - number of fringes 3. I have no idea how to do this...

Why does the eta prime meson have such a narrow decay width (ie long lifetime) compared to the rho and omega mesons? Is there some conservation rule that supresses its decays?

Since the question quite long and contains many formulas, so i take a photo instead. my question is that for part b since Z= \sqrt{R^2+(X_L-X_C)^2} can i subst X_L = (W_0+\triangle{\omega})L and X_C = \frac{1}{(w_0+\triangle{\omega})L} into the Z= \sqrt{R^2+(X_L-X_C)^2}...

I have no ideal where to begin on this question. Light of wavelength 0.6x10^-6 meters is emmited by an electron in an atom behaving as a lightly damped SHM with a Q factor of 5x10^7. Determine the width of the spectral emmision line. I am thinking E=hv=A^2 where A^2=Q^2 for large Q...

This may be a bit of a silly question and I'm not too sure if I've posted it in the right place, But I'm a bit confused and need something cleared up. In physics/maths classes I've always read/been told that friction is not a function of contact area and only that of force. Now I'm going to...

# A Fresnel biprism arrangement used to study interference in air is immersed completely in a liquid. Will the fringe width increase, decrease or remain unchanged?

A single slit of width 1.50 um is illuminated with light of wavelenth 500.0 nm. What is the angualar width of the central maximum?

A point source of light 2.0m away from the a pinhole camera creats a 12cm wide spot of light on the screen 1.0 deep inside the camera. How wide is the aperture of the camera. I thought this was a magnification problem, so I set up the equation: h_i = .12m, h_o = x, s_i = 1m, s_o = 2.0m...