Lens Application Camera Movie Projector Magnifying Glass

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Presentation transcript:

Lens Application Camera Movie Projector Magnifying Glass Compound microscope Refracting telescope

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

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)

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

Movie Projector

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

Magnifying Glass

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

Compound Microscope

Refracting Telescope Same principle as compound microscope – uses 2 converging lenses However, object will be FAR AWAY  thus incident rays are considered to be parallel

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