Make a semi-circle on drawing-board with help of a compass as shown in fig. Mark angles from 0° to 90° on it. Place two plane mirrors along the lines A, B and C,D in such a way that these mirrors are at right angles to each other. Now place a pen in between the two mirrors and tell how many images of pen are formed? you will find that three images are formed for an object placed in between mirrors at right angles to each other
1. How many images of pen are formed?
2. Write the formula for calculating the number of images formed for an object placed between two parallel mirrors at a certain angle.
3. On keeping the two mirrors parallel, how many reflections of the object in their middle are formed?
