What Causes a ‘Sundial’ to Tell Time?

A sundial tells time using the sun and a shadow. Imagine it’s like a clock that uses sunlight instead of numbers or hands. The shadow moves as the sun moves across the sky, showing the hours, just like a hand on a clock. A simple sundial has a stick called a gnomon, and when the sun shines on it, the tip casts a shadow that points to the time on the ground. It’s like having a little sun helper in your garden telling you what hour it is.