Take two plane mirrors. Set them at right angles to each other with their edges touching (Fig.). To hinge them you can use adhesive tape. Place a coin in between the mirrors. How many images of the coin do you see (Fig.)?
Now hinge the mirrors using the adhesive tape at different angles, say 45°, 60°, 120°, 180°, etc. Place some object (say a candle) in between them.
Note down the number of images of the object in each case.
Finally, set the two mirrors parallel to each other. Find out how many images of a candle placed between them are formed (Fig.).
(i) When two plane mirrors are joined at right angles, then three images are formed.
(ii) When two plane mirrors are joined at 45°, 7 images are formed.
(iii) When two plane mirrors are joined at 60°, 5 images are formed.
(iv) When two plane mirrors are joined at 120°, 2 images are formed.
(v) When two plane mirrors are joined at 180°, 1 image is formed.
(vi) When the plane mirrors are parallel to each other, infinite images are formed.