Fill the gaps on lenses

Exercise and reference answers

Missing parts

1. Answer

   convex

   Choices

   1. convex
   2. concave
   3. plane

2. Answer

   focal

   Choices

   1. focal
   2. focus
   3. field

3. Answer

   dioptres

   Choices

   1. dioptres
   2. metres
   3. newtons

4. Answer

   1.33

   Choices

   1. 1.33
   2. 1.53
   3. 1.73

Complete the statement

A {0} lens is thicker in the middle and converges light. Power is one over the {1} length, measured in {2}. Water has refractive index {3}.

Instructions

Tap a word or figure to drop it into the slot.

Explanation