I'm currently designing an experiment on Double slits for a high school science fair, but I'm not sure whether it's plausible or not. I'll be spending some of my savings for this, that's why I would like to hear some feedback from more-knowledgeable people first. In this experiment, I am trying to find out whether Heisenberg's Uncertainty Principle would work through a barrier, such as a thin piece of cardboard or something. In order to do this, I will do three different "sub-experiments" within my experiment: 1. Double slit + a laser pointer 2. Double slit separated by a barrier + a laser pointer 3. Double slit separated by a barrier + 2 laser pointers Note: The barrier I'm talking about will merely divide the beam from the laser pointer, but I will not put a barrier that would hinder the interference of light. Like this: http://imgur.com/a/oewPU I'm thinking the first part of my experiment would serve as my "control" and the second one will be the "independent" experiment. With the first experiment, I would prove that the Uncertainty Principle is true. With the second one, I am trying to find out whether it works through barriers or not. And I'm thinking the third one is merely to see whether two separate laser pointers would interfere with each other. I'm basing my experiment from Veritasium's videos on Double slits, and Uncertainty Principle.