Focal length - PowerPoint PPT Presentation

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Focal length

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Focal length Focal length Focal length F F Focal length is the same on both sides of the lens * Lenses Lenses * Axis Object Image Object distance (o) Image distance ... – PowerPoint PPT presentation

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Title: Focal length


1
Lenses
  • Focal length

Focal length
Focal length
F
F
Focal length is the same on both sides of the lens
2
Lenses
  • Other words you need to know about lenses


Object
Image distance (i)
Axis
Object distance (o)
Image
Lens
3
Lenses
  • The three standard rays


F
F
4
Lenses
  • Linear magnification the formula

 

 
3 cm
9 cm
5
Lenses
  • Make a virtual image (magnifying glass)


F
F
6
Lenses
  • Calculations on virtual images (VWO only)

M 2,5 o 2 cm
 
i ?
i -5 cm
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