Sanjay was going to his office in his car. While driving his car, Sanjay saw a man behind him on a motorcycle through his rear-view mirror. A woman was also sitting behind the man on the motorcycle. Through his rear-view mirror, Sanjay noticed that the saree of the woman was almost touching the spokes of motorcycle wheel. He signalled the motorcyclist to stop and alerted the woman. She tied her saree properly and thanked Sanjay for the alert.
(a) What kind of mirror is used by Sanjay as rear-view mirror ?
(b) State two characteristics of the image formed by such a rear-view mirror ?
(c) What could have happened if Sanjay had not alerted the woman sitting at the back of motorcycle ?
(d) What values are displayed by Sanjay in this incident ?

Explanation

(a) Convex mirror.
(b) The characteristics of the image formed by rear-view mirror (which is a convex mirror), are (i) virtual and erect, and (ii) diminished (smaller than the object).
(c) If Sanjay had not alerted the woman sitting at the back of motorcycle, then her saree could get entangled in the spokes of moving motorcycle wheel and cause a serious accident.
(d) The values displayed by Sanjay in this incident are (i) Vigilant (because he kept careful watch for possible danger around him) (ii) Concern about others (here he was concerned about the safety of the woman), and (iii) Responsible citizen (because he stopped the motorcycle and alerted the woman about impending danger to her life).