Hey guys, As you can see this is my first post on the forum. I came here hoping to find some ideas for doing research with Schlieren photography. I am currently a senior in university and want to do research in physics for my final semester here. I came across Schlieren photography while brainstorming on Google and began reading into it. I found some DIY articles online on how to make it at home. Has anyone had any experience with it? How hard is it to make one? I'm willing to put work into as I am really interested in it. My other question is that does anyone have any ideas about applications for this system once I have made it? I want to sell this idea to my professor who will be advising me in this research, but I want to have a good application for it once its created. I thought about fluid and air flow, aerodynamics, etc. but not sure about anything else. Hopefully you can help me out! Thanks.