a) When Vp not equal to Vg ..then how does Vp×Vg=c^2 as mentioned in the expert answer ? The photo is attached below b)Phase velocity and group velocity are equal to each other when phase velocity is independent of wavelength ie when dVp/ d lambda =0 . Explain the given statement elaborately using equations and relations . How does lambda even come into picture.. when we are talking about Vp and Vg being equal to each other ?
a) When Vp not equal to Vg ..then how does Vp×Vg=c^2 as mentioned in the expert answer ? The photo is attached below b)Phase velocity and group velocity are equal to each other when phase velocity is independent of wavelength ie when dVp/ d lambda =0 . Explain the given statement elaborately using equations and relations . How does lambda even come into picture.. when we are talking about Vp and Vg being equal to each other ?
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a) When Vp not equal to Vg ..then how does Vp×Vg=c^2 as mentioned in the expert answer ? The photo is attached below
b)Phase velocity and group velocity are equal to each other when phase velocity is independent of wavelength ie when dVp/ d lambda =0 . Explain the given statement elaborately using equations and relations . How does lambda even come into picture.. when we are talking about Vp and Vg being equal to each other ?
Transcribed Image Text:7:23
@ a l 46%
w
Step3
c)
When ", 7 Vg
Vp X Vg = c²
→ % = c2
= =1 x 10-17
= = 0
Thus w – k curve is
k
w
II
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