In a beauty parlor, a customer sits halfway between two plane mirrors seperately by a distance of 2 m . Each mirror forms a series of images as a result of successive reflections from each mirror. The image formed by one mirror will be the object for the other mirror. Find the distances of the first and second images of the customer formed by each mirror.
"l_1=1~m,"
"l_2=(1\\cdot 2+1)\\cdot 2-1=5~m,"
"\u2206l=l_2-l_1=4~m."
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