Two thin equiconvex lens of focal length 20 cm are placed with their o – InterviewSolution

1.	Two thin equiconvex lens of focal length 20 cm are placed with their optic centres 50 cm apart. The equivalent focal length of the combination, when the beam is incident parallel to the principal axis ,is=?
Answer» Two thin equiconvex lens of focal length 20 cm are placed with their optic centres 50 cm apart. The equivalent focal length of the combination, when the beam is incident parallel to the principal axis ,is=?

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