Shift Definition and 614 Threads

Dear sir, Iam looking for hard ware support design circuit for AC phase angle shift as per our desiered degree level, For that any circuits is available ?, or we go for coustamized design? Help me. Rajesh.p

Homework Statement 1. A signal of the form x(t) = A cos(ω0t + φ) is plotted below. From the plot, deduce the following: (a) the amplitude A, (b) the period T0, (c) the radian frequency ω0, and (d) the phase φ in radians. For part (e), find f0 in Hz by converting the radian frequency from part...

I have read that the rear surface reflection of a half-silvered mirror undergoes no phase shift. But they caution that this is true only for a dielectric mirror. What is the answer for a metallized mirror? It seems to me that the answer must either be 180 degr., or pass continuously to 180 degr...

I am reading a text about how MRI works and I came across a thing that I am totally confused. The book mentions about that few particles side by side with their nuclei spinning at the same frequency but they all have a phase difference. Since MRI cannot measure the phase differences directly...

Hello all, so let's suppose a photon is being gravitationally red or blue shifted changing its frequency which ultimately changes its energy, where does this energy change come from?

When we look out into deep space we see a red shift in the light from distant sources because they are more or less all receding from us. How is the red shift distorted by passing through our local galactic gravitational well, before hitting us down here on the ground?(more red/more blue/no...

Homework Statement Mary is blowing her trombone at 400hz. Paul is approaching her at speed v, blowing the same type of trombone. These trombones has a maximum frequency of 500hz. What is the maximum speed Paul can approach Mary, and still cancel out her trombone noise? Homework...

I was just wondering if this problem is right and I'm missing something or ... http://www.astronomy.ohio-state.edu/~ryden/ast143/ps3_soln.pdf Cuz I'm reading the GRE book and it says here to use the relativistic Doppler shift formula. So the problem in the link would need to be solved like...

I have not seen this discussed so this a question in the form of a statement for clarity. If light left a star 10 billion years ago and space has expanded for 10 billion years before the light is observed the light frequency would be stretched out or red shifted therefore some of the red...

Homework Statement The spaceship is approaching Earth with a speed ##\scriptsize 0.6c## under an angle of ##\scriptsize 30^\circ##. What frequency does an observer on Earth measure if spaceship is sending frequency ##\scriptsize 1.00\cdot10^9Hz##. Homework Equations Lets say we take the...

Say ##V_{out}=4e^{j\frac {\pi}{6}}##, what is this mean? It is a scalar voltage. Does this means: 4e^{j\frac {\pi}{6}}=4\left(\cos \frac {\pi}{6}+j\sin \frac {\pi}{6}\right) = 4(0.866+j0.5) = 3.4641+j2=4\angle 30^o What is the phase shift means, reference to input? Thanks

I could only find abstracts for proposals of methods that could accomplish this. I don't have any subscriptions to journals so I can't read the papers. Also while I'm on the subject, the energy levels of antihydrogen should be the same as hydrogen right?

Doppler Shift/ Doppler effect! HELP 1. A police car is traveling at a constant speed of 110. km/h with a radar gun which generates and detects radiowaves. The police car and the ambulance drive directly towards each other. The radar gun produces radiowaves with a wavelength of 0.0440 m. An...

I have long been curious as to the Big Bang. Our cosmology is based on Hubble's observation of the red-shift and its interpretation, and our observations are made to fit the interpretation of an expanding universe. What if simply the frequency of electromagnetic radiation decays (lengthens) with...

Hi all, It is my understanding that a Doppler shift is the result of a change in wave frequency due to a change in distance of a signal source, relative to the observer. I assume that the change in distance must be continuous, in order to observe a Doppler effect: frequency increase =...

Gravity effects the energy of a photon per the equation GM/c^2r. I understand that a photon traveling on a crash course with a black hole will be blue shifted according to the hole's mass, however I'm a little confused as to what happens when a photon simply passes nearby a massive object. For...

Spectral redshift is currently understood to be of a variety of sources, velocity / doppler redshift, gravitational redshift, cosmological redshift, etc. Is there any ability to tell,purely from the spectral analysis of the light itself, without knowing what the source of the light is, what...

Hey all, I am having trouble with this problem: A sampled sinusoidal signal having a normalized frequency of 0.30π is sent through an FIR filter. The filter impulse response is, h[n] = 1/3δ[n] + 1/3δ[n-1] + 1/3δ[n-2] From this I must find out by what factor the input signal is...

In a hypothetical universe where mass of matter constantly increases, will we observe that distances also constantly increase? This is not a new theory, I'm just asking what classic GM says about that. If we are in a galaxy with constantly increasing mass, measuring distances to other...

Hello everybody, All resources I found online about CCDs, state that they shift charge one step at a time. How does this shift take place? Thanks

Hi all, Let's say you are at rest with respect to the galaxy, and you have low energy photons all around you. Now, if I crank my energies up relatvisitcally, the frequency and thus E = hf of those photons will increase. Red Light becomes Blue Light, Blue Light becomes UV, UV to X-ray, and...

Homework Statement With regard to Young’s Experiment, derive a general expression for the shift in the vertical position of the mth maximum as a result of placing a thin parallel sheet of glass of index n and thickness d directly over one of the slits. Identify your assumptions. Homework...

A search for the term "Paradigm Shift" brings up a definition and a list of examples including Einsteins Relativity. What is it, exactly, about Relativity that constitutes a paradigm shift? JM

How does the gravitational red shift causes time dilation?

Homework Statement light signal of frequency 33 MHz is reflected off a (radio)mirror that is moving toward you at half the speed of light. What is the reflected frequency in Hz?Homework Equations f_f = f*sqrt((1-v/c)/(1+v/c)The Attempt at a Solution The mirror and light wave are approaching...

Hi, I'm trying to adapt the doppler shift formula for a stationary listener and a source traveling in a straight line towards/away from the listener to the case where the source does not move straight towards the listener. For example, suppose that I am looking north and train further in the...

i am looking for the amplitude ratio and phase shift of this graph? could someone explain me how to obtain these results from this type of graph? thank you

http://en.wikipedia.org/wiki/List_of_relativistic_equations#Doppler_shift and http://www.physics.umanitoba.ca/~souther/waves02/feb0402/sld011.htm If you look at the derivation on Wikipedia: v' = γv But the one on Uni of Manitoba shows: f' = f0(1-β^2)^(1/2) or f' = f/γ...

Hi everyone, I signed up just to ask you guys a quick question, as most of you will know infinitely more than I do on this subject. I'm not an astrophysicist, I have a strong interest in the universe and cosmology, but it's more of a hobby for me than a central focus, so I apologise in...

Homework Statement The magnetic moment for an electron is \mue = -e/m Se. The magnetic moment for a positron is \mue = +e/m Se. In the ground state, the quantum numbers are n=1 and l=0. a) What is the physical mechanism for the Zeeman shift? b) Write the Hamiltonian and identify H0 and...

I have indirectly sought the answer to this for some time (since I studied an introductory course in optics 'long' ago), but nobody has been able to give a satisfactory answer, and I have not been able to find the exact answer on the Internet either. My question is about optics, and more...

As the title says, I'm interested in the precision a Doppler shift can be revealed. That's why I read that it's possible to detect exo-planets by measuring the Doppler shift of the star's spectra. Works like this: the stars moves, since it moves back and forth is spectrum suffer from Doppler...

Homework Statement http://www.aapt.org/physicsteam/2010/upload/2010_FmaSolutions.pdf See Number 24Homework Equations CoM = M1x1 + M2x2 / (M1+M2) MOI_disk: 1/2mr^2 The Attempt at a Solution So what I was thinking was find the new CoM then use the parallel-axis theorem. To find the new CoM: MsXs...

Homework Statement i am using the Doppler shift formula Fs=F0(1/1+-(vsource/c) i can rearrange it to an extent but when i use it to find my answer i i need to divide it by two in order to do it, every time. I would just like to understand why this is, or if i am doing it completely wrong...

Heres the scenario 2 entangled particles one sent to an event Horizon due to the increase in gravity it will blue shift. The other particle at the same time is sent in the opposite direction. For purpose of this let's say that the force of gravity is simultaneously reducing. In a manner that...

Earlier today I was on youtube when I saw this comment I went to respond to this saying that the light would blue shift out of the visible spectrum and you wouldn't be able to see anything. But then I thought about time dilation from relativity and wondered if the slowing down of time would be...

Homework Statement You are standing on the side of the Trans-Canada Highway as the Physicsmobile approaches you. As it approaches, you hear an engine noise of 1100 Hz. After it passes, you hear an engine noise of 950 Hz. How fast was the Physicsmobile travelling? Homework Equations...

X-rays with a wavelength of 0.2x10^-9 m collide with a target. The scattered X-rays experience a Compton shift of 0.0007x10^-9 m. What is the energy of the scattered X-rays?Just wondering what equations I would use here etc? Any help would be much appreciated, thanks.

Homework Statement I'm confused on whether or not two functions would be equivalent or not. Let's say x(t) is a triangle with height 1, width 1. The hypotenuse of it is the function t (with a slope of 1). I'm told that x((t+2) / 4) then is making it 4 times as wide and left-shifting the...

I had been wondering if this were possible for a long time. While working on my MS thesis at school, I learned about Phase Locked Loops for the first time. It took me weeks of curling up at night with H.&H. The Art of Electronics for me to even get the concept. I had never heard of a Bode plot...

I would like to know a function or at least an approach toward developing a function that describes the change of gravity on the Earth's surface due to the sun, moon and if possible, the tides. I am quite familiar with the fundamentals but my math isn't up to this. Thanks in advance...

Respected Friends ! I want to know the relationship between Phase Shift (PS) and Phase Shift Keying (PSK). Please can anyone help me. Thank You

Hi, I can't seem to find any straightforward information on this. I know wave transmission does not change the incident wave's phase, and wave reflection shifts it by $\pi$ if the wave is reflected by a denser medium than the one it is in... But what happens to the phase when the wave undergoes...

In my intro. to GR class we recently covered the Kruskal Szekeres diagram and trajectories within the diagram. My question comes from a comment made by my professor about time-like trajectories emerging from v=0 and that if an emitter sends a light signal to an observer it will be blue shifted...

We talked about AC circuits and phase shifts were discussed. Voltage changes "lag behind" current changes so that's how we get phase shifts. It's like a sinusoid so fine. Then we talked about impedance. There's a real and "imaginary" component to impedance, graphed on x-axis and y-axis...

... In other words a photon is energy-mass equivalent so it is effected by gravity. If the photon comes from a place of very high gravity, and we see it shifted, does the emitter have to be moving? ( this is a trick question. I'm heading to Mach's Principle :-) If high gravity can dopple...

This might be obvious but i was listening to someone talk about how he believes the big bang is cyclical and the universe is constantly expanding and contracting. now i don't believe this but one of the points he raised was (and i know it doesn't support his argument) we don't know if galaxies...

Basically, all more distant galaxies have a Red Shift that increases with the distance to the galaxy, the Universe is expanding. 1) If there are other pieces of evidence that indicate the Universe is expanding, what are they? 2) Any internet links describing exactly how the other...

for the given circuit and waveform , i am not getting how output for ωt < π is Vs + E1 ? given Vs is input and equal to Vm Sinωt

A police car is traveling at a constant speed of 100. km/h with a radar gun which generates and detects radiowaves. The police car and the ambulance drive directly towards each other. The radar gun produces radiowaves with a wavelength of 0.0650 m. What doppler shift (Δf = f′–f) is detected...