Multiple choice

Coherent light is ...

  1. Light energy that is not "in phase"

  2. Light energy that is "in phase"

  3. Light energy that is "out of sync"

  4. White light that is "out of phase"
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Coherent light consists of waves that are in phase, meaning their peaks and troughs align perfectly. This spatial and temporal alignment is what allows laser beams to remain focused over long distances.

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