JAMB Physics 2015 Paper

Concept:For a plane mirror, the image is formed as far behind the mirror as the object is in front of it.Explanation:Mr. Abioye is standing $4.7\, \mathrm{m}$ away from the plane mirror.His image will therefore be formed $4.7\, \mathrm{m}$ behind the mirror.The total distance from his eye to the image is the sum of these two distances.Thus, image distance $= 4.7\, \mathrm{m} + 4.7\, \mathrm{m} = 9.4\, \mathrm{m}$.Answer:The image is $9.4\, \mathrm{m}$ away from Abioye's eye.Correct option: A. $9.4\, \mathrm{m}$.