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The image formed by a concave mirror is real, inverted and with the same size as the object. The position of the object is kept:
far away from the centre of curvature
at the centre of curvature
between the focus and the centre of curvature
at the focus
at the centre of curvature
A concave mirror forms a real, inverted, and same-sized image of an object only when the object is placed at the centre of curvature (C). At this position, the light rays from the object strike the mirror and reflect back to converge exactly at the same point from which they originated.
A concave mirror forms a real, inverted, and same-sized image of an object only when the object is placed at the centre of curvature (C). At this position, the light rays from the object strike the mirror and reflect back to converge exactly at the same point from which they originated.
Think of it like a perfectly balanced seesaw; when the weight (the object) is placed exactly at the pivot point (the centre of curvature), the reflection on the other side is the exact mirror match in height and distance.
Remember the sequence 'Beyond C, At C, Between C & F, At F'. As you move the object closer to the mirror, the image moves further away and grows larger.
m=hoтАЛhiтАЛтАЛ=тИТuvтАЛ тАФ Magnification formula where m=тИТ1 at C
f1тАЛ=v1тАЛ+u1тАЛ тАФ Mirror formula relating focal length, object distance, and image distance
When an object is placed at C (u=2f), the incident rays follow standard paths: a ray parallel to the principal axis passes through the focus (F), and a ray passing through the focus reflects parallel to the axis. These rays intersect at C on the other side of the mirror, resulting in an image that is real, inverted, and identical in height to the object (m=тИТ1).
Object at C implies u=2f
Image is formed at the same location v=2f
Magnification m=тИТ1 signifies equal size and inverted orientation
Real images are always inverted in spherical mirrors
Useful for demonstrating precise ray optics properties
Provides a reference point to measure focal length
Optical bench experiments
Telescopes using primary mirrors
When object is at C, the distance from the pole is 2R where R is radius of curvature.
Wrong Options: 'At the focus' results in an image at infinity. 'Between focus and center' creates a magnified image beyond C.
B is correct тАФ The image formed by a concave mirror is real, inverted, and of the same size as the object when the object is placed at the centre of curvature.
Remember: Object at C is the 'equilibrium' position for concave mirrors where image properties mirror object properties exactly.
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