What is the best description of the destructive interference of light?

a. a longitudinal wave meets transverse light wave
b. two waves have the same direction of displacement
c. a mechanical wave meets an electromagnetic wave
d. two waves have displacement in opposite directions

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )