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Which quantity is being described?

Exercise and reference answers

Items
  1. Item
    Critical angle i_c
    Category
    An angle
  2. Item
    Angle of minimum deviation
    Category
    An angle
  3. Item
    Focal length f
    Category
    A distance
  4. Item
    Radius of curvature R
    Category
    A distance
  5. Item
    Measured in dioptres
    Category
    A power
  6. Item
    Adds for lenses in contact
    Category
    A power
Categories
  1. Item
    An angle
  2. Item
    A distance
  3. Item
    A power

Explanation

Critical angle, focal length and power are all single numbers describing very different things. Source: syllabus Physics Part II, Ch 9 Ray Optics and Optical Instruments.
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