Plane mirror image at intersection of backward-extended reflected rays

Steps:

• Identify incident rays from object O hitting the mirror at points of incidence.
• Apply law of reflection: angle of incidence equals angle of reflection at each point.
• Draw reflected rays from incidence points away from the mirror.
• Extend reflected rays backward until they intersect; this intersection is the image position.

Why B is correct:

• By the plane mirror reflection law, virtual images form where backward extensions of reflected rays meet, behind the mirror at equal distance from O.

Why the others are wrong:

• A: Intersection of incident rays, not reflected, so not the image.
• C: Forward extension of reflected rays, which diverge and form no real image.
• D: Arbitrary point unrelated to ray intersections, violating reflection principles.

Final answer: B