1. Limited time only! Sign up for a free 30min personal 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!

About wave motion

  1. Nov 14, 2014 #1
    For an progressive wave why the phase particle lags behind of time than it's predecessor one ? we know for a particle which is at the origin follows the equation # # y=# # A sin \omega t and the following particle follows # # y=# # A sin \omega (t-x/t)
     
  2. jcsd
  3. Nov 14, 2014 #2

    sophiecentaur

    User Avatar
    Science Advisor
    Gold Member
    2017 Award

    Hi and welcome.
    I asked that very same question when I was at school; it seems 'backward' at first sight. The Maths describes what happens and you can justify that negative sign in the wave equation by realising that the phase of the wave, seen at a more distant point, is earlier (because the later bit of the wave hasn't arrived yet). The negative phase value means a lag in the wave.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...
Similar Threads for wave motion Date
I Deriving equation of wave motion May 28, 2017
B SHM and Wave Sep 8, 2016
I Minimum velocity for a surfer to catch a wave Sep 2, 2016
Question regarding wave motion Jun 27, 2015
Wave motion Feb 6, 2015