Re: No coherence! Please try harder.
One of the lecturers at uni told us to picture a laser beam as "a million identical red VW beetles driving at exactly the same speed and at exactly the same distance from each other through a staight tunnel".
One of the lecturers at uni told us to picture a laser beam as "a million identical red VW beetles driving at exactly the same speed and at exactly the same distance from each other through a staight tunnel".