Amplitude Definition and 825 Threads

Maybe this should be under QM but it's a pretty simple question. How does the amplitude of a light wave varie (if it varies at all), if it doesn't what is the lenght?

Quardrature Amplitude Modulation. I know the basic techniques, like when you have 1 point and only two signals are to be multiplexed. But the constellations got me a bit confused. My text-book doesn't explain it thoroughly, and there isn't much deep information about it on the internet...

box of mass 2kg on spring with k=13 N/m, they are on a wheel. The road has an amplitude δ = 2 cm as shown above. What speed is necessary for the mass to have a maximum amplitude x = 2δ . the picture looks something like this __ |__| m=2kg \ / k=13 N/m \...

Why is the formula for period of simple harmonic motion independent of amplitude?

Having a little trouble with this one: A 4kg mass is attached to a spring and executes simple harmonic oscillation with a period of 1.50s. The total mechanical engery of the system is 12J. What is the spring constant. Determine the amplite. I was able to find the amplitude which is 0.585m...

Hey dearest people Who can help me solve the following problem? A wave pulse is described by, y = 0.04exp(-0.6(68x - 7600t)2) [m]. Here t is measured in seconds, x and y are measured in meters. a) What is the velocity of this wave pulse? Be careful to get the sign of the velocity...

I have no idea why I can not get this question, but here it is: A brick is resting atop a piston that is moving vertically with simple harmonic motion of period 1.19 s. At what amplitude will the brick separate from the piston? I know that once the acceleration is greater than that of...

A 4.0 Hz wave with an amplitude of 12 cm and a wavelength of 30.0 cm travels along a stretched string. (a) How far does the wave travel in a time interval of 3.0 s? m (b) How far does a knot on the string travel in the same time interval? m I got the answer to part (a) by using...

A brick is resting atop a piston that is moving vertically with simple harmonic motion of period 1.08 s. At what amplitude will the brick separate from the piston? I came across this question reviewing for my test next Thursday. Anyway, I can calculate the angular frequency using the...

I understand there is a way to solve the problem with complex numbers, but am at a loss as to how: Determine the amplitude of the resultant motion when two sinusoidal motions having the same frequency and traveling in the same direction are combined, if their amplitudes are 3 cm and 4 cm and...

I'm given two things: frequency, f = 313 Hz intensity, I = 1.13 uW/m^2 (microWatts per square meter) I'm supposed to find the amplitude of the air vibrations caused by this sound. As always, a push in the right direction is greatly appreciated.

I have a short question: an object undergoes simple harmonic motion with a period T and amplitude A. How long does it take the object to travel from x = A to x = A/2 ? the answer is T/6, but I am not sure how to get to that, Do I get it from x = Acos(2pi/T xt)? help :cry:

i learned that EM wave is varying electric field and magnetic field .But what's the meaning of the amplitude of EM wave? The displacement of the photon or the magnitude of the electric/magnetic field(no. of photons)?

A phrase was used the other day that gave me rise to question, and that is frictional amplitude. Has anyone ever heard this phrase in the context of lasers especially cutting. Not knowing enough about lasers just yet I can neither confirm nor deny the validity of the phrase. I have done...

A weight hanging on a vertical spring is set in motion with a downward velocity of 6 cm/sec from its equilibrium position. Assume that the constant w for this particular spring and weight combination is 2. Write the formula that gives the location of the weight in centimeters as a function of...

Amplitude ?? Magnitude ?? Dear all, would you tell me what is the difference of Amplitude and Magnitude ?? thanks

gravitational radiation is now widely accepted, and the mathematical outcome of an events radiation is calculable, but why is the inverse square law applicable to the amplitude of this radiation?

how to i solve the amplitude 3sin(2x)+4sin(x)

I've been staring at this problem for a loonnng time and i just can't figure it out:(.. i would appreciate it if someone could help me...thx! :) A large block with mass 26 kg executes horizontal simple harmonic motion as it slides across a frictionless surface with a frequency 1:9 Hz ...

Can the amplitude and phase associated with each of the paths in the Feynman path integral be connected to geometric attributes of that path? For example, is the amplitude and phase connected to how long the path is or how much it curves or how much it deviates from the geodesic?

What does the A stand for in the equation: y=A\sin{(kx-t\omega)} CHEERS :)

Stupid Amplitude...HELP! So I am working on some phys homework and I had a question about this problem: If the Amplitude of a sound wave is quadrupled, by what factor will the intensity increase? And I thuoght that the relationship between Intensity and amplitude was that Intensity is...

I have already posted (at school) my answer to this one, but the more I think about it, the more I'm confused. The question is "When playing a violin, the effect produced when the bow is drawn faster across the string is; a. A higher pitch. b. greater wave velocity in the string. c. a...

How would you calculate the intensity using relative amplitude. Say for a violin...how would you calculate it's intensity for one of it's harmonics or overtones.

Do higher frquencies have higher amplitude? Bats communicate at Ultasonic frequencies. DOes this mean the waves amplitude is very high?