1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Amplitude ? Magnitude ?

  1. Apr 8, 2004 #1
    Amplitude ?? Magnitude ??

    Dear all,

    would you tell me what is the difference of Amplitude and Magnitude ??

  2. jcsd
  3. Apr 8, 2004 #2
    In what context?
  4. Apr 8, 2004 #3


    User Avatar
    Science Advisor

    Amplitude is the maximum displacement from equilibrium in a sinusoidal wave.
    Magnitude is just the value of something; typically refering to scalar quantities.

    It's sort of hard to describe magnitude.
    Last edited: Apr 8, 2004
  5. Apr 8, 2004 #4
    Amplitude is also the maximum value of the magnitude. The magnitude is simply the absolute value of the displacement, and since the amplitude is the maximum value of the displacement, the amplitude will be the maximum of the magnitude.

    If you took a tape measure and measured the distance between the equilibrium point and the current position for a given time for a wave, that's the magnitude.

    If you took a tape measure and measured how far away the wave gets over all time, that's the amplitude.

  6. Apr 9, 2004 #5


    User Avatar
    Homework Helper

    In QM, amplitude can be complex valued.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Amplitude ? Magnitude ?
  1. Amplitude of Pendulum (Replies: 1)

  2. Wave amplitude (Replies: 1)

  3. Wave amplitude (Replies: 17)