Aplane dioptric surface separates two homogeneous media of indexes n ans n'. a is the object and a' its image through the dioptic surface. find the relation between ha and ha' under gauss conditions

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

there are no correct statementd on the list of choices you provided.

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