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Applications of Lenses

Applications of Lenses. Common Applications. Eye Glasses Contact Lenses Microscopes Telescopes Camera Lenses Projector. Two Common Types of Eye Problems. Near-Sighted-can’t see far. Eye is longer than normal Focal length insufficient. Far-Sighted-can’t see close. Eye is too short

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Applications of Lenses

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  1. Applications of Lenses

  2. Common Applications • Eye Glasses • Contact Lenses • Microscopes • Telescopes • Camera Lenses • Projector

  3. Two Common Types of Eye Problems • Near-Sighted-can’t see far. • Eye is longer than normal • Focal length insufficient. • Far-Sighted-can’t see close. • Eye is too short • Muscles don’t work properly

  4. Far-sighted • Need a converging lens. • Eye needs help converging light rays sooner so they don’t go out of the back of the eye.

  5. Near-Sighted • Need a diverging lens. • Eye needs rays to converge further back so the diverging lens moves the focus point back further.

  6. Microscopes • Goal is to make something small bigger. • Which type of lenses would you use? • Both Actually. • Need to make image bigger but need to refine image also.

  7. Telescopes

  8. Camera Lenses

  9. Projector

  10. Review • I want you to be able to talk intelligently about lenses in a given object. • Diverging vs. Converging • Be able to apply

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