What about wave interference[1]? 1. http://www.physicsclassroom.com/class/waves/Lesson-3/Interference-of-Waves http://www.physicsclassroom.com/class/waves/Less

What about wave interference[1]? 1. http://www.physicsclassroom.com/class/waves/Lesson-3/Interference-of-Waves http://www.physicsclassroom.com/class/waves/Lesson-3/Interfe...