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Converging or diverging?

Exercise and reference answers

Items
  1. Item
    Focal length is positive
    Category
    Converging
  2. Item
    Power is positive
    Category
    Converging
  3. Item
    A convex lens
    Category
    Converging
  4. Item
    Focal length is negative
    Category
    Diverging
  5. Item
    Power is negative
    Category
    Diverging
  6. Item
    A concave lens
    Category
    Diverging
Categories
  1. Item
    Converging
  2. Item
    Diverging

Explanation

A positive focal length converges, a negative one diverges, and power carries the same sign as f. Source: syllabus Physics Part II, Ch 9 Ray Optics and Optical Instruments.
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