Show Me Your Badge

At the end of “Fundamentals of Atomic Force Microscopy,” a short online course offered by Purdue University, students who score at least 60 percent on the final exam will receive an e-mail with a file attached. It will contain a picture of a blue-and-white circle, roughly one inch in diameter, embossed with the stylized image of an atomic force microscope bouncing a laser beam off a cantilever into a photodiode, which is how scientists take photographs and measure the size of very small (nanoscale) things.