1. Lens Application Camera Movie Projector Magnifying Glass
Compound microscope
Refracting telescope

2. Converging Lens - Review
When object is beyond 2F’
2F’ F’ O F 2F

3. Camera Camera uses CONVERGING LENS Object has to be beyond 2F’
Image captured will be smaller, real image, between F and 2F
Image captured on film or CCD (charged-coupled device)

4. Movie Projector Also CONVERGING LENS but works opposite of a camera
The object (on film) must be upside-down and
between 2F’ and F’
Image captured on screen will be larger, inverted real image
2F’ F’ O F 2F

5. Movie Projector

6. Magnifying Glass Use CONVERGING LENS
Object located between F’ and lens
Image will be larger, virtual, on same side as object.
2F’ F’ O F 2F

7. Magnifying Glass

8. Compound Microscope
Uses 2 converging lenses (so much greater magnification)
1st lens create a larger, real image (not seen by our eye,
as it is inside the tube of microscope)
2nd lens create a much larger virtual image F F’
EYEPIECE LENS
OBJECTIVE LENS
OBJECT
REAL IMAGE
VIRTUAL
IMAGE

9. Compound Microscope

10. Refracting Telescope
Same principle as compound microscope – uses converging lenses
However, object will be FAR AWAY  thus incident rays are considered to be parallel

11. Refracting Telescope
1st image is larger, inverted real image (not seen as it is located inside the tube of telescope)
2nd image is larger, virtual image
For “terrestrial telescope” – 3rd lens used to “flip” image upright