Have you ever wondered what it is like to see something invisible?
The aim of my project was to create a homemade experimental stand (following Foucault’s idea) and to show that physics can be breath taking. My project allows seeing different gases, air currents and movements, a breath or even sound waves. With the use of a special apparatus consisting of a mirror, a video camera, an LED light, and a razor blade, it is possible to see something that a bare eye cannot, such as warmth coming from a hand. All thanks to the occurring physical phenomenon like refraction, the fact that the razor blade lets only some of the reflected light rays back into the camera lens, the “invisible” image can be created. It is magical when you can see physics, and schlieren imaging makes it possible.