Question

22. Three lenses in contact have a combined focal length of 12 cm. When the third lens Is removed, the conbine 60 focal length is cm. The third lens is (1) A converging lens of focal length 30 (2) A converging lens of focal length 60 cm (3) A diverging lens of focal length 30 (4) A diverging lens of focal length 60 cm RE​

Answer 1

Answer:

do with 1/f=1/v+1/u

Explanation:

by this answer will be correct

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