JaiNobeZ
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- Jan 21, 2010
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Alright. I'm doing a peice of Physics Coursework for my A-Level. It's worth 40/300 marks so it's quite important and I need some help, and probably will throughout the process of writing it so I'm starting this thread.
Every time I encounter a problem I'll post it in here and hope (possibly in vain, but hopefully not) that someone will come to my aid. Alternatively, If there's anyone nice enough to let me PM them when I run into trouble that would be much appreciated.
The coursework is mainly on Quality of Measurement and our ability to assess error margins & such. Nasty stuff. But we've got to show off our knowledge of Physics at the same time. Mine is on using three different methods to find the focal point of a lens. If anyone's really interested I'll post more info.
My first problem is that i know the equation 1/F = 1/V - 1/U when V is the Image distance (distance from the lens to the screen) and U is the Object distance (distance from the object to the lens), but I don't understand WHY. My textbook is pretty much useless.
So can anyone explain why 1/F = 1/V - 1/U?
Thanks in advance. You're all really helpful and I'll repay one day sooner or later if i can. Maybe by donating, or maybe by helping to aid the collective knowledge contained on the forum.
tl;dr Why does 1/F = 1/V - 1/U?
Every time I encounter a problem I'll post it in here and hope (possibly in vain, but hopefully not) that someone will come to my aid. Alternatively, If there's anyone nice enough to let me PM them when I run into trouble that would be much appreciated.
The coursework is mainly on Quality of Measurement and our ability to assess error margins & such. Nasty stuff. But we've got to show off our knowledge of Physics at the same time. Mine is on using three different methods to find the focal point of a lens. If anyone's really interested I'll post more info.
My first problem is that i know the equation 1/F = 1/V - 1/U when V is the Image distance (distance from the lens to the screen) and U is the Object distance (distance from the object to the lens), but I don't understand WHY. My textbook is pretty much useless.
So can anyone explain why 1/F = 1/V - 1/U?
Thanks in advance. You're all really helpful and I'll repay one day sooner or later if i can. Maybe by donating, or maybe by helping to aid the collective knowledge contained on the forum.
tl;dr Why does 1/F = 1/V - 1/U?
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