- #1

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I want to know the mathematical relationship between the phase velocity and group velocity.

Thanks a lot.

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- Thread starter iVenky
- Start date

- #1

- 212

- 12

I want to know the mathematical relationship between the phase velocity and group velocity.

Thanks a lot.

- #2

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- 443

If you know the definitions, you can easily find a relationship.

- #3

- 212

- 12

If you know the definitions, you can easily find a relationship.

It looks as if the group velocity is the derivative of phase velocity but I don't think I am correct.

What's the exact relationship?

Thanks a lot.

- #4

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The group velocity can be related to the derivative of phase velocity (in respect to k or λIt looks as if the group velocity is the derivative of phase velocity but I don't think I am correct.

). It is not just equal to the derivative, it won't even make sens dimensionally. What relationship did you find?

- #5

- 212

- 12

The group velocity can be related to the derivative of phase velocity (in respect to k or λ

). It is not just equal to the derivative, it won't even make sens dimensionally. What relationship did you find?

Could not find anything.

- #6

morrobay

Gold Member

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- #7

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I did not mean to look it up but to find it by direct calculation.Could not find anything.

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