Question

A point object starts moving along x-axis with constant velocity 0.5 m/s in positive x-direction from origin. A plane mirror of length 2 m is placed parallel to x axis at a distance 3m from x-axis and at a distance 10 m from y-axis as shown in figure. Time for which an observer positioned at (11, -1) m will see image of point object in the mirror will be​

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