An object $A B$ is placed on the principal axis of two lenses of equal focal length ( $f$ ). The lenses are separated by a distance $2 f$ , as shown in the figure. Using ray diagram locate the image formed by each lens and state their nature.

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Solution

The complete ray diagram will be,
$A' B'$ is the image formed by the first lens $L_{1}$ .
Nature=virtual, erect, magnified, and on the same side of the lens
$A " B "$ is the image formed by the second lens $L_{2}$ .
Nature of the image is real, inverted, diminished, and on the opposite side of the lens

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