Lenses

Lenses

1. Define

   • Converging Lens
   • Diverging Lens
   • Optic Centre
   • Axis
   • Focus
   • Focal Length
   • Real/Virtual Image
   • Magnification
   • Power of a lens

2. Draw

   • A ray diagram to locate the image formed in a convex or concave lens, no what what the position of the object

3. Experiments

   • To measure the focal length of a converging lens

4. Describe

   • Optical structure of the eye

5. List

   • Practical uses of lens

6. Formulae

   • 1/u +1/v = 1/f
   • m = v/u
   • P = 1/f
   • P = P1 +P2
   • 1/f = 1/f1 +1/f2

7. Answer these questions

   • What is short sight?
     • What type of lens can be used to correct short sight?
   • What is long sight?
     • What type of lens can be used to correct it?