Phase change

  • #1
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Main Question or Discussion Point

kl gives the phase change over a distance l.

I need an explanation.

I understand that k is the wavenumber. In other words, it is a measure of the number of cycles of a wave (in terms of radians) per unit length. Therefore, kl gives the number of cycles traversed over a distance l. How does that mean that kl is the phase change?
 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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hi failexam! :smile:
I understand that k … is a measure of the number of … radians per unit length. Therefore, kl gives the number of cycles traversed over a distance l. How does that mean that kl is the phase change?
k = radians per length,

so k times length = radians

(and phase is in radians)
 

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