Effective focal length of a two-lens system

Journal article

Authors/Editors

WITTAYA KANCHANAPUSAKIT

Strategic Research Themes

Creative and Learning Society (Strategic Research Themes)

Publication Details

Author list: Pattarapon Tanalikhit, Thanabodi Worakitthamrong, Wittaya Kanchanapusakit

Publisher: American Association of Physics Teachers

Publication year: 2025

Journal acronym: Phys. Teach.

Volume number: 63

Issue number: 7

Start page: 602

End page: 603

Number of pages: 2

ISSN: 0031-921X

eISSN: 1943-4928

URL: https://pubs.aip.org/aapt/pte/article-abstract/63/7/602/3364794/Effective-Focal-Length-of-a-Two-Lens-System?redirectedFrom=fulltext

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Abstract

Measuring the focal length of a given lens is a basic experiment in physics education. However, many optical devices, such as cameras and telescopes, consist of a system of lenses arranged at a specific distance apart. This article considers a pair of lenses at a distance whose effective focal length is theoretically derived and experimentally verified.

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