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When an object is placed at the centre of curvature in front of a concave mirror, the characteristics of the image formed are:
Question

When an object is placed at the centre of curvature in front of a concave mirror, the characteristics of the image formed are:

A.

at the focus, upright, virtual and diminished

B.

at infinity, real, inverted and highly enlarged

C.

between the focus and the mirror, virtual, upright and enlarged

D.

at the centre of curvature, real, inverted and of the same size

Correct option is D

The correct option is: (d) at the centre of curvature, real, inverted and of the same size

Explanation:
  • Aconcave mirrorforms an image based on the object's position relative to itsprincipal focus (F)andcentre of curvature (C).

  • When the object is placedat the centre of curvature (C), the image is formedat the same point, i.e., atC.

  • The image isreal,inverted, andof the same sizeas the object due to symmetrical ray convergence.

Information Booster:
  • Type of Mirror: Concave (converging mirror).

  • Ray Behavior: Parallel rays after reflection pass through the focus; rays through centre reflect back on themselves.

  • Image Nature: Real and inverted (can be projected on a screen).

  • Image Position: Formed exactly at the centre of curvature.

  • Magnification: Magnification (M) = -1 (same size but inverted).

  • Use Case: Commonly used in shaving mirrors and dentist’s mirrors when magnified reflection is needed (object closer than C).

Additional Information:
  • Option (a): Incorrect; object at focus forms image at infinity, not diminished or virtual.

  • Option (b): Happens when the object is at focus (F), not at centre (C).

  • Option (c): Describes the condition when the object isbetween pole and focus, not at centre of curvature.

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