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Sort each item by what it describes

Exercise and reference answers

Items
  1. Item
    Thick in middle
    Category
    Lens shape
  2. Item
    Thick at edges
    Category
    Lens shape
  3. Item
    Two surfaces
    Category
    Lens shape
  4. Item
    Dioptre
    Category
    Lens power
  5. Item
    One over f
    Category
    Lens power
  6. Item
    Positive or minus
    Category
    Lens power
  7. Item
    Water is 1.33
    Category
    Refraction
  8. Item
    Speed of light
    Category
    Refraction
Categories
  1. Item
    Lens shape
  2. Item
    Lens power
  3. Item
    Refraction
Instructions
Tap an item, then tap the box it belongs in.

Explanation

_Source: syllabus Science, Ch 10 'Light - Reflection and Refraction'_
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