Two Point Charge Force Calculation on Left Side

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Homework Statement



Two point charges sit on either side of large grounded conducting plane. Give an expression for the force experienced by the charge on the left hand side. There is a neg charge on one side and positive charge on the other side.

Homework Equations



The electric force equation:

F=Q1Q2/4pi*Ep*r^2

The Attempt at a Solution



Well I know that if I have a charge on one side of conductor there will be a force as if there was an opposite charge on the opposite side of the conductor. So my rationale of thinking is that there will be a force on the charge as if there were 2X the charge on the opposite side of the conductor (since there is one there already plus the image) Is this the correct way of thinking? Thanks!
 
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thats what i was thinking when read the question too
 
Great! Thanks!
 

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