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!

Optics: Determine which of the following describe traveling waves

  1. Oct 9, 2011 #1
    I'm really rusty on waves. What characteristics am I looking for? With respect to its variables, doesn't a valid wave equation have to contain only linear terms in its argument(s)?

    http://i111.photobucket.com/albums/n149/camarolt4z28/IMG_20111009_211512.jpg?t= [Broken]
     
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Oct 9, 2011 #2

    ehild

    User Avatar
    Homework Helper
    Gold Member

    Yes, a wave has the form f(ax-bt).

    ehild
     
  4. Oct 13, 2011 #3
    Yes, I know that.

    It appears (d) is valid, but what about (a), (b), and (c)? I guess I'm not sure what the squares do. Of course, I recognize the form of the equation without the squares.
     
    Last edited: Oct 13, 2011
  5. Oct 13, 2011 #4

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Having (ax±bt)2 shouldn't matter. The squaring can be considered to be part of function, f .
     
  6. Oct 13, 2011 #5
    Same goes for cos2, too?
     
  7. Oct 13, 2011 #6

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Yes.
     
  8. Oct 14, 2011 #7
    What about (b)? It has az2 - bt2.
     
  9. Oct 14, 2011 #8

    ehild

    User Avatar
    Homework Helper
    Gold Member

    If it is a travelling wave, in what direction does it travel? +z or -z?

    ehild
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Optics: Determine which of the following describe traveling waves
Loading...