Two concave lenses are kept in contact and magnitude of equivalent focal length is found to be f_(1). Now the space between two lenses is filled with liquid of refractive index slightly more than 1. The magnitude of focal length of combination becomes f_(2).

Two concave lenses are kept in contact and magnitude of equivalent foc

1.	Two concave lenses are kept in contact and magnitude of equivalent focal length is found to be f_(1). Now the space between two lenses is filled with liquid of refractive index slightly more than 1. The magnitude of focal length of combination becomes f_(2).
Answer» `f_(1) = f_(2)` ` f_(1)gt f_(2)` ` f_(1)LT f_(2)` ` f_(2)`cannot be defined Solution :Lens formed in between two CONCAVE LENSES is convex ONE and HENCE overall focal length of combination increases.

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Two concave lenses are kept in contact and magnitude of equivalent focal length is found to be f_(1). Now the space between two lenses is filled with liquid of refractive index slightly more than 1. The magnitude of focal length of combination becomes f_(2).

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