Phase difference Definition and 162 Threads

Homework Statement See figure attached. Homework Equations The Attempt at a Solution \Delta L = asin\theta = m \lambda If the waves are in phase, we would expect L to me a integer number of wavelengths, when they are out of phase, L should be an odd number of wavelengths, but...

Homework Statement Light of wavelength 612nm in a vacuum travels 1.57pm in a medium of index of refraction 1.51. Find a)The wavelength in the medium. b)the optical path length c)the phase difference after moving that distance, with respect to light traveling the same distance in vacuum...

Homework Statement A source is transmitting a sound wave of frequency 115 Hz. A receiver detects the direct sound wave and the sound reflected from a small section of wall. Speed of sound is 345 m/s. It also gives a diagram of sound waves leaving a source, one hitting the wall, reflecting...

Homework Statement Light of wavelength 526 nm is incident normally on a film of water 1.0 µm thick. The index of refraction of water is 1.33. (c) What is the phase difference between the wave reflected from the top of the air-water interface and the one reflected from the bottom of the...

Homework Statement Hi Please, I am not sure about this problem. It reads this way: Two identical pendulums X and Y each consist of a small metal sphere attached to a thread of a certain length. Each pendulum makes 20 complete cycles of oscillation in 16s. State the phase difference in...

greetings, i wonder if anyone could tell me that how and why there is 180 phase shift in single stage transistor amplifier circuit?

Why should phase difference be small when resonance is small?

I'm writing up a prac that involved LCR circuits. One part of the prac involved measuring the phase difference between the voltage across the capacitor (V_C) and the inductor (V_L), while the frequency of the input signal was varied. This was done by measuring the distance between peaks...

Hi, I came across this question on waves which tells you how to calculate the phase difference and the lag time but I don' uderstand why it is 60 degrees.Although I'm notable to draw th diagram,I will write down the explination What is the phase relationship b/w the two signals?(y1 and y2)...

Homework Statement Two sinusoidal waves in a string are defined by the functions y1 = (2.00 cm) sin(20.0x – 32.0t) and y2 = (2.00 cm) sin(25.0x – 40.0t) where y and x are in centimeters and t is in seconds. (a) What is the phase difference between these two waves at the point x...

My book saya that in a pure circuit , the phase difference between the voltage and current must be pi/2 , otherwise it is not pure . Why it is so ? What is a pure circuit by the way ?

Hi, I'm having trouble understanding where the formula (appearing in my notes or Wikipedia) comes from. One can read on Wikipedia: The phase difference between each succeeding reflection is given by \delta = \frac{2 \pi}{\lambda}2nlcos\theta Where n is refractive index inside cavity, l...

Homework Statement Two antennas located at points A and B are broadcasting radio waves of frequency 96.0 MHz, perfectly in phase with each other. The two antennas are separated by a distance d=12.40m. An observer, P, is located on the x axis, a distance x=55.0m from antenna A, so that APB...

Homework Statement Light of wavelength 418 nm is incident normally on a film of water 1.0 μm thick. The index of refraction of water is 1.33. (a) What is the wavelength of the light in the water? (b) How many wavelengths are contained in the distance 2t, where t is the thickness of the...

Hi The way my teacher has defined coherency between two waves is that their mutual phase difference ∆ must be constant. With this in mind, does it make sense to talk about coherence between two waves, who do not share the same frequency?

Homework Statement The diagram attached shows two coherent sources P and Q which produce waves of the same phase with wavelength , labda . If the two waves meet at the point R , the phase difference between waves at R is ?? Homework Equations y=a sin (omega t + kx) The Attempt at a...

Hi The phase difference associated with a light wave going through a birefringent material is given in this link (the first equation) http://en.wikipedia.org/wiki/Wave_plate My question is: Why do they only treat the spatial difference? I mean, there should also be a phase difference...

Consider two loudspeakers (emitting sound waves of the same amplitude and wavelength of 15m) and an observer located in the x−y plane, with the two loudspeakers being at (2m, 0) and (−2m, 0), respectively, and the observer being at (0, 3m) initially. (i) Suppose the intensity of the combined...

For instance, I know if a light wave traveling air (n = 1) enters a thin film of water (n = 1.33), there will be a phase difference. My textbook sol'n manual states that there will be a 180 degree phase difference for a wave of light that reflects of the top of the air-water boundary, but NO...

Hello all. I have two functions in time f_1(t) and f_2(t) composed of the same set of frequencies such that, say, f_1(t) = \sum a_n \cos(\omega t + d_1(t)) and f_2(t) = \sum b_n cos(\omega t) and I would like to find out the value of the phase difference (I've set the phase in f_2 equal...

Homework Statement A tuning fork is in a hall 47.0 m long, and is placed 14.0 m from one end. It generates a tone of 246Hz. What is the phase difference when the waves traveling in each direction bounce back and meet each other? Homework Equations Calculated wavelength with 343/246. Also...

Homework Statement I have a laser focused into a lithium niobate crystal and an analyzer placed after the crystal. The analyzer and laser are cross polarized. I'm trying to derive the equation that relates the phase difference of the o-wave and e-wave after the analyzer. I know it is...

http://i49.tinypic.com/ejyka9.jpg i know that there is a phase difference between the current and its voltage for each component but here its between the voltage of the source and the impidance of each components how did they get the angle in each equation? in each equation we have Vm divided...

Homework Statement Two waves with identical frequency but different amplitudes A1 = 6.0 cm and A2 = 2.0 cm, occupy the same region of space (are superimposed). (a) At what phase difference does the resulting wave have the largest amplitude? Homework Equations I have found the...

Phase Difference - Waves! Help! URGENT Homework Statement Firstly, can I add that this question is second part of a question , the first part asked me to find the amplitude and wavelength of a wave from a picture, I got these to be a) Amplitude = 8mm - b) Wavelength = 47mm <<<<These two are...

The title is all i want to know really. Any help much appreciated Also, what is a superposition pattern?

Homework Statement Consider a lightwave having a phase velocity of 3 x 10^8 m/s and a frequency of 6 x 10^14 hz. What is the shortest distance along the wave between any two points that have a phase difference of 30 degrees ? What phase shift occurs at a given point in 1 microsecond and...

Bit of a noob question, I've measured the phase difference between sine waves of V(in) and V(out) using an oscilloscope to be 22.0 micro-seconds at a frequency of 10.4 kHz. How would I find the phase difference in degrees? Thanks.

Homework Statement We have the standard standing wave equation, y=2Acos(2\pi \frac{x}{\lambda})sin(2\pi \frac{t}{T}). We must prove that if two x-positions on the wave have an even number of nodes between them, they have a phase difference of 0, whereas in the opposite condition, they have a...

How to calculate interaural phase difference and interaural time difference ? Here is what I am given: A sound reaches one ear with a mean phase of 338 degrees and vector strength of 0.67 It reaches the other ear with a phase of 294 degrees and vector strength of 0.60 The sound frequency...

Homework Statement A tuning fork generates sound waves with a frequency of 246Hz. The waves travel in opposite directions along hallway, are reflected by end walls, and return. The hallway is 47.0m long and the tuning fork is located 14.0m from one end. What is the phase difference between...

Homework Statement let there be three points: A, B, and D. Light of wavelength 400 m is emitted from the source at A to the destination D, and also from B to D. Line segment AD is 100 m longer than BD. The starting phase of the light at A is pi/2 radians ahead of B. At point D, what is the...

Homework Statement Two Loud speakers are placed on a wall 3.79 meters apart. A listener stands directly in front of one of the speakers, 65.6 meters from the wall. The speakers are being driven by the same electric signal generated by a harmonic oscillator of frequency 4010 Hz The speed of...

Homework Statement When a wave travels through a medium, individual particles execute a periodic motion given by the equation : y = 4.0 sin[ pi/4(2 t + x/8)] where y and x in meters and t in seconds the phase difference at any given instant are 20.0 m apart is

Homework Statement Two sinusoidal waves in a string are defined by functions y1= (2.00cm)sin(20x-32t) y2=(2.00cm)sin(25x-40t) where y and x are cm and t is sec (a) What is the phase difference between these two waves at the point x = 5 cm and t = 2 s? (b) What is the position x value...

Homework Statement a spherical sound wave source at the origin emits a sound wave with frequency 13100Hz and a wave speed of 346m/s. what is the phase difference in degrees and radians between the two points with (x,y,z) co-ords (1cm,3cm,2cm) and (-1cm,1.5cm,2.5cm)?? Homework Equations...

Homework Statement For single-slit diffraction, calculate the first three values of \phi (the total phase difference betweenrays from each edge of the slit) that produce subsidiary maximu by a) using the phasor model b) setting \frac{dI}{d\phi} = 0, where I is given by I = I_0 \cdot...

hi, i understand how to use steam tables, but my problem is i cannot tell which phase the water is currently in. i do all the calculations, but how do i choose which phase? i ask because one of my questions asks for phase difference. many thanks jared james

[SOLVED] What is the phase difference between the motions of two points on the wave.. Homework Statement The frequency of a certain wave is 500Hz and its speed is 340ms^{-1}.What is the phase difference between the motions of two points on the wave 0.17cm apart? Homework Equations x =...

What's the difference between Phase, Phase Difference and Phase Shift in terms of waves? I've taken a look to Wikipedia and a few other sites already, so please do not forward me to them...

Two particles are executing SHM with same amplitude and frequency (but with a phase difference). The maximum separation between them was found to be equal to the amplitude. What is the phase difference. This is a question that I came across. And I solved it the following way. Assume...

[SOLVED] phase difference problem - need help Homework Statement Two particles execute simple harmonic motion of the same amplitude and frequency along close parallel lines. The pass each other moving in opposite directions each time their displacement is half their amplitude. What is...

Homework Statement A wave at the origin expands outwards passing the points (.01, .03, .02) and (-.01, .015, .025). This wave has a wave speed, V_w = 346 m/s and frequency = 13100 HZ. What is the phase difference between these two points? Homework Equations v =...

Homework Statement A light wave is propagated from point A to point B in space. We introduce along the way a glass lens with parallel faces of index 1.5 and width L=1mm. The value of teh wavelength is 500μm in space. How many wavelengths are between A and B with and without the glass lens...

I can't believe I'm asking this, but for some reason I cannot remember this. Here is the basic question from my power class. Q: What is the phase difference between: v=V_{max}\sin \omega t i = I_{max} \cos( \omega t - 30) So we simply rewrite v as: v = V_{max} \cos ( \omega t + 90 )...

Consider Figure 1. Estimate the phase di®erence between the waves y(x; t) and g(x; t) at time t0. Select the result closest to your estimate. A. 2.09 radians B. 0.333 C. 0.167 D. 1.045 radians E. 0.5 m F. None of these Solution: 2.09 radians...

Homework Statement first of all, when two waves are out of phase. We tend to ay one wave lags by the other wave of x degrees. So what does lag mean. does it mean its displacement is less or more and how do i calculate the value of x. and does x also mean the phase difference between...

Homework Statement Two sound fonts make plain armonic waves with the same amplitude and frequency. If f=200 Hz and V=340 m/s, the phase difference in a point situated 8m away from one font and 25 m away from the other one will be... Homework Equations V=Yf Y: Wave longitude Phase...

respected members, could anyone explain the difference between path difference and phase difference ? what does the term phase exactly mean? thanks in advance

Homework Statement What is the ratio of the intensity at this point to the intensity at the center of a bright bridge Homework Equations GIVEN: Wavelength=6.9x10^-7m d=0.00014m (distance between slits) L=12m (Length to screen/point) Y=14mm EQUATION: I=Io...