Questions
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
detailed solution
Correct option is D
water between two convex lenses can be considered as a concave lens.So, 1f=(μg-1)×2R=1Rfor concave lens power = 1f1=(μwater-1)(-2R)=-23fsolving both the equation feq=3f4Talk to our academic expert!
Similar Questions
Image of the sun is formed by a binconvex lens of focal length f. The image is a circular patch of radius r and is formed on the focal plane of the lens. Choose the correct statement from the following
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