1 and 17 have been answered. 18 is a classic Lissajous figure with one degree of freedom - a simple pendulum with some friction and distortion. 28 used an LCD screen (a polarizer is built into all of them) on a laptop with a polarizing filter on the lens of the camera. Ditto for 29. 30: The reflection suggestion from someone might be a possibility. If we'd taken the course, we could have aced this part of the exam. I'm not going to download the rest of the exam to shame myself! I have to confess that I'm an engineer, not a photographer! Roger Sent from my iPad On Feb 25, 2012, at 7:39 PM, Andrew Davidhazy <andpph@xxxxxxx> wrote: > I just prepared an exam for a "Special Effects" (no computer generated ones) > class I am currently wrapping-up designed primarily for non technology students > such as advertising, fine art, biomed, visual media, etc. Basically "mathphobics". ;) > You can see a "teaser" with 6 questions at the link shown below. > > http://www.davidhazy.org/andpph//2012-docs/2012-spefex-teaser-1.jpg > > If you would like the full version write to me personally instead of this list but > you have to promise not to divulge its contents at least for next few days. > Also, if you happen to be in the class congrats! but you don't get any more > than these 6! > > Unfortunately no answers are included but I guess individual questions could > be discussed on this list. As well as suggestions for improvements. > > My email address for requests will be andpph@xxxxxxxxxxxxx and with the > word EXAM in the subject line. > > Andy