- #1

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## Homework Statement

I believe I need to rearrange this formula to find an equation for λ:

P2 / P1 = exp( - (z2 - z1)) / λ

## Homework Equations

I think I need to differentiate and find the natural log of both sides then rearrange

## The Attempt at a Solution

Differentiate to: ln(P2 / P1) = ( - (z2 - z1) / λ

Rearrange to: λ = - Δz / ln(P2 / P1)

Does that look right? I appear to be able to calculate it....