- #1
Dassinia
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Hello
I have this tab
http://img18.imageshack.us/img18/3317/eyph.png
Anf I have to find the group and phase velocities for a wavelength λ=550nm
v(phase)= c/n
v(group)=dw/dk
v(phase)*v(group)=c²/n²
I don't know how I can determine n for the wavelength of 550nm using the tab ?
I was absent the day of this course
Can I use the relation v(phase)*v(group)=c²/n² ?
Thanks !
Homework Statement
I have this tab
http://img18.imageshack.us/img18/3317/eyph.png
Anf I have to find the group and phase velocities for a wavelength λ=550nm
Homework Equations
v(phase)= c/n
v(group)=dw/dk
v(phase)*v(group)=c²/n²
The Attempt at a Solution
I don't know how I can determine n for the wavelength of 550nm using the tab ?
I was absent the day of this course
Can I use the relation v(phase)*v(group)=c²/n² ?
Thanks !
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