Ray diagram of concave mirror when object is at C

 To draw a ray diagram of the concave mirror when the object is at C (centre of curvature), we must follow the rules for making a ray diagram by a concave mirror.

Steps to draw to ray diagram

   1.   Draw the diagram of a concave mirror

   2.   Place the object at the given position

   3.   Follow the rules for making a ray diagram

 

Draw the diagram of a concave mirror

Place the object at the given position

 We have to place an object at C. The Object is an up-arrow (↑).

Follow the Rules for making ray diagram

A light ray from point ‘A’ of the object incident parallel to the principal axis on the concave mirror.

The second light ray from the same point incident on the mirror after passing through the focus point (F).

After reflection, the parallel ray passes through the focus point (F) and the second ray becomes parallel.

 Both reflected rays meet at ‘C’ . so the image is formed at C.

 The image is real and inverted and the same size as the object.

Position of image	At C (centre of curvature)
Nature of image	Real and inverted
Size of image	Same size

 

For the object at C, watch the video from 10.15 min 

Related Topics

1. Object beyond C

2. Object between C and F

3. Object at infinity

4. Object between F and P

Image formation by convex mirror

1. Object between infinity and mirror

2. Object at infinity