right so you notice here this way from curvatures are complementary to the from here right but this phase conjugate mirror is gonna return away from a in the same direction this is almost like a time reversal right the concept is like a time reversal you record some scene right if the person walks forward you play it backward the person is gonna walk backward so we want a wave we want an optical waves to walk backwards right so that's why the phase can't you mirror does right when you go through the bottle the wavefront distortion is gonna