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Derive an expression for the focal length of the combination o
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Derive an expression for the focal length of the combination of two th

Derive an expression for the focal length of the combination of two thin convex lenses placed in contact. What will be the focal length of the combination, if one lens is concave and is of the same focal length ? A convex lens and a plane mirror are at apart. Final image formed by a parallel beam of light incident on the lens is at the optical centre of the lens. Find focal length of the lens drawing suitable ray diagram. 5

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Derive an expression for the focal length of the combination of two thin convex lenses placed in contact. What will be the focal length of the combination, if one lens is concave and is of the same focal length ? A convex lens and a plane mirror are at apart. Final image formed by a parallel beam of light incident on the lens is at the optical centre of the lens. Find focal length of the lens drawing suitable ray diagram. 5
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Question Text
Derive an expression for the focal length of the combination of two thin convex lenses placed in contact. What will be the focal length of the combination, if one lens is concave and is of the same focal length ? A convex lens and a plane mirror are at apart. Final image formed by a parallel beam of light incident on the lens is at the optical centre of the lens. Find focal length of the lens drawing suitable ray diagram. 5
Updated OnNov 26, 2022
TopicOptics
SubjectPhysics
ClassClass 12
Answer Type Video solution: 1
Upvotes145
Avg. Video Duration13 min