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An object is placed a distance yo = -2f in front of a concave mirror of focal length f that is located at y = 0. An identical object is placed a distance yo = -2f in front of a convex mirror of focal length
-f that is located at y' = 0. The difference between the two image positions, y; -y, is
а.
b. f.
с.
4
d. 2f.
e.
8

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