Spot the one that does not fit

Exercise and reference answers

Questions

1. Items

   1. Rays diverge
   2. Rays converge
   3. Focus in front
   4. Concave mirror

   Odd item

   Rays diverge

2. Items

   1. Objective lens
   2. Eyepiece lens
   3. Compound scope
   4. Angle of prism

   Odd item

   Angle of prism

3. Items

   1. Distant objects
   2. Cassegrain
   3. Mirror objective
   4. Simple magnifier

   Odd item

   Simple magnifier

4. Items

   1. Angle of incidence
   2. Angle of emergence
   3. Angle of deviation
   4. Focal plane

   Odd item

   Focal plane

Instructions

Tap the item that does not belong with the rest.

Explanation