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Focal Length

523 bytes added, 08:26, 19 December 2019

→‎About Focal Length

*[[Focus]] the [[image]] of a "distant object" onto a [[screen]].

*[[Measure]] the [[distance]] between the [[lens]] and the [[screen]].

: The [[Image Distance|image distance]] (the distance between the [[focus]]sed [[image]] and the [[lens]]) is the same as the [[Focal Length|focal length]] for a "distant object".: If the [[Object Distance|object distance]] (the distance between an [[object]] and a [[lens]]) is too small, then the [[Focal Length|focal length]] is not the same as the [[Image Distance|image distance]].

===References===

:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Focal length, pages 208-211, GCSE Physics; Third Edition, Oxford University Press, AQA '']

:[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Focal length, pages 266, 267, 272, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA '']

====Edexcel====

:[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Focal length, pages 119, 121, GCSE Physics, CGP, Edexcel '']

====OCR====

:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Focal length, pages 162, Gateway GCSE Physics, Oxford, OCR '']

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