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Curved lenses 13.1, 13.3

Curved lenses 13.1, 13.3. SNC 2D1 Mr. Dvorsky. Diverging lens, Concave shape. F. Converging lens, Convex shape. Lens diagram set up. VIRTUAL FOCAL POINT. object. O. 2F. 2F’. F’. F. 2F. F. OPTICAL CENTRE. HOW DO WE KNOW WHICH SIDE IS REAL AND WHICH SIDE IS VIRTUAL?.

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Curved lenses 13.1, 13.3

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  1. Curved lenses13.1, 13.3 SNC 2D1 Mr. Dvorsky

  2. Diverging lens, Concave shape F

  3. Converging lens, Convex shape

  4. Lens diagram set up VIRTUAL FOCAL POINT object O 2F 2F’ F’ F 2F F OPTICAL CENTRE

  5. HOW DO WE KNOW WHICH SIDE IS REAL AND WHICH SIDE IS VIRTUAL? REMEMBER THAT PREVIOULY THE REAL SIDE IS WHEREVER THE OBSERVER WHO IS SEEING THE IMAGE IS LOCATED…WHEN DEALING WITH LENSES, WHICH SIDE IS THIS? REAL VIRTUAL object O 2F 2F’ F’ F 2F F OPTICAL CENTRE

  6. RAY #1: Any ray that is parallel to the PA is refracted through the F RAY #2: Any ray that pass through F is refracted parallel to PA RAY #3: Any ray that passes through O continues through USE SAME CONCEPTS AS THE ONES USED IN MIRRORS object O 2F 2F’ F’ F 2F F

  7. SPECIAL CASES WITH CONVERGING LENSES (p. 377)

  8. Object beyond 2F’: image is real, inverted, smaller O 2F 2F’ F’ F 2F F

  9. Object at 2F’: image is inverted, same size, real O 2F 2F’ F’ F 2F F

  10. Object between F’ and 2F’: image is beyond 2F, real inverted, larger O 2F 2F’ F’ F 2F F

  11. Object at F’: no image Light rays remain parallel and don’t converge thus no image formed O 2F 2F’ F’ F 2F F

  12. Object between lens and F’: image is virtual, erect, larger O 2F 2F’ F’ F 2F F

  13. RULES WITH DIVERGING LENSES

  14. RAY #1: Any ray that is parallel to the PA appears to be refracted through the F’ RAY #2: Any ray that appears to pass through F is refracted parallel to PA RAY #3: Any ray that passes through O continues through object 2F 2F’ F’ F 2F F

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