A charge Q is placed at (a, b) between two right angled grounded conducting planes. Then the image charges and their locations are
1
– Q(a, –b), – Q(–a, –b), – Q(–a, b)
2
– Q(a, –b), – Q(–a, b), + Q(–a, –b)
3
– Q(a, –b), + Q(–a, b), – Q(–a, – b)
4
+ Q(a, –b), + Q(–a, b), – Q(–a, –b)