An object is 27 cm from a thin concave lens along the axis. If a virtual image forms at a distance of 11 cm from the len
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An object is 27 cm from a thin concave lens along the axis. If a virtual image forms at a distance of 11 cm from the len
An object is 27 cm from a thin concave lens along the axis. If a virtual image forms at a distance of 11 cm from the lens, what is the focal length of the lens? Please give answer in cm.
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