Before using a laser in an experiment, you should check that:

  1. the room is completely dark
  2. it is the most powerful available
  3. it is a low-power class suitable for school use and never pointed at eyes
  4. it is pointed at a mirror facing you
Answer

C) it is a low-power class suitable for school use and never pointed at eyes

Eye safety. SLO P-11-N-01 · Application

Physics MCQ · More Experimental Skills and Data Analysis MCQs · Practise