If in a concave mirror, the object is placed beyond the centre of curvature C, the size of the image will be _______.

The Correct answer is diminished.

Key Points

• In a concave mirror, when an object is placed beyond the centre of curvature (C), the image formed is real, inverted, and diminished.
• The centre of curvature (C) is a point on the principal axis of the mirror which is the centre of the sphere from which the concave mirror is a part.
• The image formed is located between the focus (F) and the centre of curvature (C).
• This property of concave mirrors is used in applications such as telescopes and vehicle headlights to focus light.
• The formation of a diminished image beyond C shows the focusing power of concave mirrors.

 Additional Information

• highly enlarged
  • This occurs when the object is placed between the focus (F) and the pole (P) of the concave mirror.
• enlarged
  • This occurs when the object is placed between the centre of curvature (C) and the focus (F) of the concave mirror.
• similar size
  • This occurs when the object is placed at the centre of curvature (C) of the concave mirror.