- #1
good_phy
- 45
- 0
Hi, It is long time to come here sine i graduate University.
Anyway, My question is whether exact form of Group velocity is [tex]\frac{dw}{dk}[/tex]
or [tex]\frac{dw}{dk}|_{\bar{k}}[/tex]
I want to know whether Group velocity is independent of K, propagation number
Becasue Group velocity is 'proper' speed of generally complex wave in comparision with
phase velocity So These exists only one Group velocity of certain wave which should not be
dependent of any K
Second Question is what does Group delay means? I have to drive Formula of Group delay
,[tex]\frac{d\varphi }{dw}[/tex] but i don't know what does it means.
Please Solve my question.
Anyway, My question is whether exact form of Group velocity is [tex]\frac{dw}{dk}[/tex]
or [tex]\frac{dw}{dk}|_{\bar{k}}[/tex]
I want to know whether Group velocity is independent of K, propagation number
Becasue Group velocity is 'proper' speed of generally complex wave in comparision with
phase velocity So These exists only one Group velocity of certain wave which should not be
dependent of any K
Second Question is what does Group delay means? I have to drive Formula of Group delay
,[tex]\frac{d\varphi }{dw}[/tex] but i don't know what does it means.
Please Solve my question.