A pendulum 2 meters long is positioned so that the pendulum bob isat the focus o

Question

A pendulum 2 meters long is positioned so that the pendulum bob isat the focus of a concave mirror when the bob is at rest. Thebob is then displaced halfway to the mirror and released.
a) When will the pendulum bob produce a real image inthe mirror? Can a virtual image of the pendulum bob every beformed?
b) Where along the principle axis will an imageNOT beformed in the above situation?
a) When will the pendulum bob produce a real image inthe mirror? Can a virtual image of the pendulum bob every beformed?
b) Where along the principle axis will an imageNOT beformed in the above situation?

Explanation / Answer

when the bob is oscillated from the mean position(focus) a)at the extreme end (obj.distance=3f/2) there will be Real image formed at the other extreme end(obj.distance=f/2) a)at the extreme end (obj.distance=3f/2) there will be Real image formed at the other extreme end(obj.distance=f/2) there will be Real image formed at the other extreme end(obj.distance=f/2) there will be virtual image formed b) at the mean position(obj.distance=f) there will be formed at infinitiv otherwise image is notformed there will be formed at infinitiv otherwise image is notformed

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