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Autor/inn/enSarkar, Soumen; Chakrabarti, Surajit
TitelDetermination of the Refractive Index of an Equiconvex Lens by Measuring Its Focal Length and Using It as a Concave Mirror
QuelleIn: Physics Education, 57 (2022) 1, Artikel 015004 (7 Seiten)Infoseite zur Zeitschrift
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ZusatzinformationORCID (Chakrabarti, Surajit)
Spracheenglisch
Dokumenttypgedruckt; online; Zeitschriftenaufsatz
ISSN0031-9120
SchlagwörterOptics; Light; Science Instruction; Physics; Measurement; Photography; Teaching Methods
AbstractIn this experiment we have first determined the focal length of an equiconvex lens. We have observed that a real image can be formed by the lens on the same side of the source if the source is sufficiently strong. This is due to the reflection from the concave surface of the lens. We have measured these image distances for different object distances. From these measurements, we have determined the refractive index of the lens as well as its radii of curvature. The relationship between the object and image distances in the reflection from the concave surface of a lens as formulated here, is similar to the ordinary reflection from a concave mirror. However, the focal length, in this case, turns out to be smaller than that of a regular concave mirror of the same radius of curvature by a factor of two, for a lens of refractive index of 1.5. (As Provided).
AnmerkungenIOP Publishing. 190 North Independence Mall West Suite 601, Philadelphia, PA 19106. Tel: 215-627-0880; Fax: 215-627-0879; e-mail: ped@ioppublishing.org; Web site: https://iopscience.iop.org/journal/0031-9120
Erfasst vonERIC (Education Resources Information Center), Washington, DC
Update2022/4/11
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