An object is kept at 60 cm in front of a plane mirror. If the mirror is now moved 25 cm away from the object, how does the image shift from it's previous position ?

An optician while testing the eyes of a patient keeps a chart of letters 3 m behind the patient and asks him to see the letters on the image of chart formed in a plane mirror kept at distance 2 m in front of him. At what distance is the chart seen by the patient?

If in the question (1) given above the object is placed symmetrically between the mirrors, then the number of images formed will be :

1. n
2. n + 1
3. n - 1
4. 0

Two plane mirrors are placed making an angle 60° in between them. For an object placed in between the mirrors, the number of images formed will be .

1. 3
2. 6
3. 5
4. infinite.