Question

# A point object is placed in front of a thick plane mirror as shown in figure below. Find the location of final image w.r.t. object. A
15/2cm
B
15cm
C
40/3cm
D
80/3cm
Solution
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#### From the mirror, It will appear as if the object has moved towards the glass block by t(1−1μ)=5(1−132)=53cmSo the apparent distance from the mirror will be 10+5−53=403cmSo image will form 403cm behind the mirror.While looking at the image through the glass block from the opposite side of the mirror, it will again shift towards the mirror by 53cmSo the apparent distance will be 403−53=353cmSo, the distance of the final image with respect to the object is 15+353=803cm

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