question_answer

A small object is placed 10 cm infront of a plane mirror. If you stand behind the object 30 cm from the mirror and look at its image, the distance focused for your eye will be   [KCET (Engg.) 2001]

A)            60 cm                                      

B)            20 cm

C)            40 cm                                      

D)            80 cm

Correct Answer: C

Solution :

                   See following ray diagram                               The distance focussed for eye \[=30+10=40\,cm\]