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huszarerik
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 Homework Statement:
 In the electric field of the pointcharge (Q) above the conducting sheet (fig 1), we follow an electric field line, which leaves the pointcharge parallel to the sheet. Where will the electric field line meet the surface of the conducting sheet?
 Relevant Equations:

Gauss's Law: ∫ E⋅da=Qin/ε
Charge density on the conductor: σ=Q*h/2*π*(r^2+h^2)^(3/2)
where:
h = distance from the pointcharge to the sheet
r = distance along the horizontal axis on the conducting sheet
I don't understand how to approach this problem. Basically it asks for the distance r.I think I should use Gauss's law, but I've been thinking about the shape of the gaussian surface and I'm not sure about how it should look or where I should place it. Any help would be useful, especially in terms of ideas.
Thank you.
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