Schlieren Optics,Education,,Demonstration of an optical technique that allows us to see small changes in the index of refraction in air. A point source of light is reflected from a concave mirror and focused onto the edge of a razor blade, which is mounted in front of the camera. Light refracted
Behind the Biennale: A Short History of the World’s Most Important Art Exhibition,People,,What would the world be like without the Venice Biennale? A chorus of art-world insiders and Venice locals respond with insights and stories, helping us navigate the cultural influence of this somewhat en