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!

Homework Help: Describing electromagnetic radiation, why is there a second sin term?

  1. Apr 25, 2013 #1
    1. The problem statement, all variables and given/known data
    Hey all,
    I am working through a derivation that my professor gave me to do and I am having trouble understanding one of the formulas that he gave me, namely:

    "EM waves can be described as:
    E(x, t) = Eosin(2πx/λ)*sin(2πc/λ)"

    The the Eo*sin(2πx/λ) term makes sense to me. I am wondering why there is a second sin term (the sin(2πc/λ)) term in the equation. I understand that c/λ = f, but in that case I still don't really understand why this term is in here. Is there a source that derives this equation anywhere? I am having trouble finding a way to understand this equation.
  2. jcsd
  3. Apr 26, 2013 #2


    User Avatar
    Science Advisor
    Homework Helper

    hi daselocution! :smile:
    shouldn't there be a t in there somewhere? :confused:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted