You have an object positioned 23 cm to the left of a diverging lens (f = -45 cm)

Question

You have an object positioned 23 cm to the left of a diverging lens (f = -45 cm), and have a converging lens (f = 9 cm) positioned 21 cm to the right of the diverging lens. Without doing any calculations, determine (a) what kind of image is created by this two-lens system and (b) what can you say (if anything) about the size of the final image (compared to the original object).

A virtual, larger
B. real, larger
C. virtual, can't determine without doing the calculations
D. real, can't determine without doing the calculations
E. virtual, smaller
F. real, smaller

Explanation / Answer

E. Virtual and smaller.

The first lens will make virtual image inside focal point of diverging lens which is smaller than the real object and outside the double of focal length of converging lens which will agin make it smaller.

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