A convex lens is in contact with concave lens. The magnitude of the ratio of their focal length ... VIDEO
A convex lens is in contact with concave lens. The magnitude of the ratio of their focal length is \( 2 / 3 \). Their equivalent focal length is \( 30 \mathrm{~cm} \). What are their individual focal lengths (in \( \mathrm{cm} \) )?https://bit.ly/YTAI_PWAP https://www.pw.live
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