When no gravitational wave passes, LIGO is set so the returning beams interfere:

  1. destructively (dark output)
  2. constructively (bright output)
  3. randomly
  4. not at all
Answer

A) destructively (dark output)

A passing wave then lets some light through. SLO P-11-D-21 · Understanding

Physics MCQ · More Gravitational Waves MCQs · Practise