Image Distance in Plane Mirrors
When you look in a straight mirror why is the reflection
appear to be further then it actually is?
When you look in a straight mirror, the reflection you see is just as
far BEHIND the mirror as the original object is in front of the mirror.
If you are 3 feet in front of a straight mirror, your reflection will
appear to be 3 feet behind the mirror, or six feet away from you. The
distance from your eyes to a reflection of an object is the distance
from your eyes to the mirror plus the distance from the mirror to the
Dr. Ken Mellendorf
Illinois Central College
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Update: June 2012