Ever wondered why a dosa turns out perfectly crispy on the outside and soft inside? The secret goes far beyond culinary instinct driven by physics. In an authored article for @dt_next @iitmadras, Prof. Mahesh Panchagnula unpacks the science behind this everyday magic. The familiar practice of sprinkling water on a hot pan before pouring the batter is actually a test rooted in the Leidenfrost Effect—a phenomenon formally identified in 18th-century Germany but intuitively mastered in Indian kitchens for generations. When the tawa isn’t hot enough, water just sits and evaporates slowly. But at the ideal temperature, droplets glide and “dance” across the surface, floating on a thin vapour layer. This same effect prevents dosa batter from sticking, allowing it to spread evenly and crisp up beautifully at the edges. So the next time you hear that sizzle, remember: making the perfect dosa is not just tradition—it’s a brilliant interplay of temperature, vapour, and technique. #Physics #IITMadras #LeidenfrostEffect