ABO NOCE Practice Test 4

10 free ABO NOCE practice questions in the real exam format, covering the official content areas, with an explanation for every answer.

ABO NOCE Practice Test 4Tutor mode

Question 1 of 10

Instrumentation

When a lens clock is rotated on the back surface of a lens, the reading changes from −4.00 D to −6.00 D. What does this show?