I is the image of a point object `O` formed by spherical mirror, then which of the following statements is incorrect :

Options

A. If `O` and `I` are on same side of the principal axis, the they have to be on opposite sides of the mirror.
B. If `O` and `I` are on opposite side of the principal axis, then they have to be on same side of the mirror.
C. If `O` and `I` are on opposite side of the principal axis, then they can be on opposite side of the mirror as well.
D. If `O` is on principal axis then `I` has to lie on principal axis only.

Answer

C

Explanation

`(I)/(O)=-(v)/(u)`
If `O` and `I` are on same sides of `PA`. `(I)/(O)` will be positive which implies `v` and `u` will be of oppostite signs. Similarly if `O` and `I` are on app. Sidess, `(I)(O)` will be-ve which implies `v` and `u` will have same sign.
If `O` is on `PA` , `I=(-(V)/(u))(O)=0` implies I will also be on. `P`,`A`.