Section III Wave Motion
3.2.5 Light: Formation of Image by Lenses
Measuring the focal length of convex lenses

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Section III Wave Motion
3.2.5 Light: Formation of Image by Lenses
Measuring the focal length of convex lenses
Section III Wave Motion
3.2.5 Light: Formation of Image by Lenses
Convex lens and concave lens
*一個小失誤,漏左講透鏡lens前後既主焦點principal focus係會用唔同既符號,一個係F,另一個係F',相關既講解會係之後既片:「Nature of images formed by convex lens 凸透鏡成像的性質」度補充返。