yea I realize you wouldn't get much thrust, but these kind of devices never would, like a solar sail...plus the idea for using prisms would be to get a double bounce effect...but you would probably have to angle the second prisms, so you get more fwd push than sideways push...but anyway...i'm an...
I just had this thought while watching a video about the EM drive...basically using 2 lasers to bounce them off prisms inside an object to push the craft through space at a small but constant acceleration...could someone explain why this would not work?...please see attached image :)