Image in convex...and concave

Effect on image of object's position relative to mirror focal point (concave)
Object's position (S),
focal point (F) Image Diagram

(Object between focal point and mirror)
Virtual
Upright
Magnified (larger)


(Object at focal point)
Reflected rays are parallel and never meet, so no image is formed.
In the limit where S approaches F, the image distance approaches infinity, and the image can be either real or virtual and either upright or inverted depending on whether S approaches F from above or below.


(Object between focus and centre of curvature)
Real
Inverted (vertically)
Magnified (larger)


(Object at centre of curvature)
Real
Inverted (vertically)
Same size
Image formed at centre of curvature


(Object beyond centre of curvature)
Real
Inverted (vertically)
Reduced (diminished/smaller)
As the distance of the object increases, the image asymptotically approaches the focal point
In the limit where S approaches infinity, the image size approaches zero as the image approaches F

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