Consider the situation shown in the Figure. The mirror AB forms image of point object P. Co-ordinates of A, B and P are (0, 10) m, (0, 8) m and `(– 2, 0) m` respectively. Two observers O1 and O2 are located at `(– 2, 10) m` and `(– 1, 13) m` respectively.
(a) One of the two observers cannot see the image of point P. Identify the observer.
(b) To ensure that both the observers are able to see the image, it was decided to use a longer mirror. Keeping the upper end of the mirror fixed at A (0, 10) m, what is the minimum length of mirror required so that both observers can see the image of point P?

Answer

(a) `O_(1)` will not see tha image (b) 5m