Question

What is a sundial ? How does it works?​

Answer 1

Answer:

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. Sundials must be corrected across the span of a time zone. ...

Answer 2

The sundial, one of the first instruments used to measure time, works by simulating the movements of the Sun. The Sun shines on a gnomon (pronounced NO-men), a triangle or device set perpendicular to a base plate, and casts its shadow on the appropriate hour line, thus displaying the time of day.