Q8 of 56 Page 1

To construct a ray diagram, we use two light rays which are so chosen that it is easy to know their directions after reflection from the mirror. List these two rays and state the path of these rays after reflection. Use these rays to locate the image of an object placed between centre of curvature and focus of a concave mirror.

The rays which are used are as follows:


1. A ray which is parallel to the principal axis. The ray passes through the principal axis after the reflection in case of concave mirror. In case of convex mirror, the ray diverges from the principal axis.


2. A Ray which pass through the centre of curvature of the mirror or the ray is directed in direction of centre of curvature of convex mirror. The rays after reflection, reflects back to the same path.


When the object is placed between centre of curvature and focus of a convex mirror, then the image formed will be beyond centre of curvature and the nature of the image formed will be a real, inverted and magnified in size.



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