What Does a Sundial Do?
For Millennia People Have Used Sundials to Tell the Time of Day Based on the Apparent Position of the Sun in the Sky. There Are Many Types of Sundials, but in...
For millennia people have used sundials to tell the time of day based on the apparent position of the sun in the sky. There are many types of sundials, but in general each consists of a gnomon, a thin rod that casts a shadow onto a dial, and a flat plate or platform.
How does a sundial work?
When the earth rotates about its axis, the sun appears to “move” across the sky, causing objects to cast shadows. A sundial contains a gnomon, or a thin rod, that casts a shadow onto a platform etched with different times. ... As a result of the tilt of the earth's axis, the visible movement of the sun changes daily.
How can a sundial be used to tell time?
In bright sunshine the gnomon on the sundial casts a clear shadow, which shows the time. Only the idea of using the sun to find the time is unfamiliar nowadays. The shadow slips past each of the hour lines rather like a clock hand.
David Miller brings 15 years of experience in global economics, personal finance strategy, and market dynamics. He specializes in turning complex economic trends into actionable insights for everyday readers.
