Nature of Images formed by Curved Mirrors

Duration: 90 minutes

Grade: IX

Objective

To observe the images formed by concave mirrors and understand about the nature of images as a consequence of the type of mirror and the position of object.

2. Learning Outcomes

Upon completion of this module, the students will be able to do the following:

draw ray diagrams to find the position and the size of images with respect to curved mirrors

distinguish between real and virtual images.

3. Summary of the Module

This module extends the students’ knowledge of ray diagrams in order to understand the nature of images formed by a concave mirror. In the starter activity, the students should be able to connect curved reflecting surfaces to objects in real life, such as the inside and outside surface of a spoon, and enquire about the nature of image formed.

The nature of images formed by a concave mirror for different positions of the object will be studied under this module. The students should observe the position and the size of the image to understand whether the image is real or virtual and inverted or erect. The students should observe the nature of images formed during the teacher’s demonstration regarding two particular positions of the object. Following this, the students, along with the teacher, are to study the nature of images for two other object positions. Finally, the students, divided in groups, are to explore the nature of images formed for two object positions by themselves. Experimental observations are to be complemented by drawing ray diagrams, following the rules pertaining to them.