Two identical glass equiconvex lenses of focal length f each are kept in contact. The space between the two lenses is filled with water . The focal length of the combination is

Two identical glass equiconvex lenses of focal length f each are kept

1.	Two identical glass equiconvex lenses of focal length f each are kept in contact. The space between the two lenses is filled with water . The focal length of the combination is
Answer» `F//3` f `4f//3` `3f//4` ANSWER :D