To improve accuracy in measuring the focal length of a lens, you could:

  1. use a bright room
  2. use a cracked lens
  3. use a distant object and darken the room to see the image clearly
  4. move the lens randomly
Answer

C) use a distant object and darken the room to see the image clearly

Sharper image. SLO P-11-N-27 · Understanding

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