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## Homework Statement

Find increase in pulse duration for 10 fs laser pulse going through 20 mm of fused silica

([itex]\phi[/itex][itex]^{(2)}[/itex])=361.626 fs[itex]^{2}[/itex] for 10 mm of fused silica)

## Homework Equations

## The Attempt at a Solution

I have no idea where to begin with this. Can anyone give me some equations or send me to a page that will help me out?

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