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## Homework Statement

An infinite plane of charge has surface charge density 6.8 µC/m2. How far apart are the equipotential surfaces whose potentials differ by 100 V? In mm

## Homework Equations

E=σ/(2ε

_{0})

## The Attempt at a Solution

So first I solved for E= 6.8e-6/(2*8.85e-12) = 384170.791

then because ΔV= E *ΔX

so

ΔX=ΔV/E

so then I substituted

ΔX = 100/ 384170.791

ΔX = .0002603

The site says that I've made a power of ten error the answer must be in mm but I'm not sure what Im doing wrong