Image of the Week: Droplet Lens A water droplet resting on a blade of grass acts as a natural convex lens. It refracts light from the printed text behind it, producing a sharp yet inverted image of the letter “m.” This simple setup illustrates the basic principle of lens imaging in a way that is both intuitive and visually striking. —Vahid Abbasian, Washington University in St. Louis, St. Louis, USA *Link in Bio #water #droplet #lens #grass #convex