just a blackboard to write on by hanshans
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But these writing devices might be much older. “I have heard that blackboards originated in India ”, says theoretical physicist Harsh Mathur of Case Western Reserve University in Cleveland, Ohio, who adds that the famous Persian traveller Al-Biruni wrote about their use in the 11th century.
The profession-defining pose is an old idea. Back in the 19th and early 20th centuries, chemists – from Louis Pasteur to Marie Curie – were commonly photographed or painted holding aloft a flask and gazing nobly at its contents. It was a gesture that actually derives from a rather unheroic tradition: physicians in the late Middle Ages and the Renaissance would typically be depicted diagnosing their patients by a visual inspection of their urine.
Despite their low-tech nature, blackboards seem to be working together with new technologies. Ali, for example, says that he and his collaborator often do computations on a blackboard and take an image of them with their mobile phones before erasing the writing and moving on to the next step. “Many a time,” Ali says, “the main idea or the main computation for a project that becomes a paper happens while we are doing these intense computations on a blackboard.”
Despite us living in an era of PowerPoint, smartboards and digital projection, the traditional blackboard still retains an aura and usefulness for physicists that more advanced technologies can’t match , as Philip Ball finds
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