What is a sundial?
Q: What is a sundial?
A: A sundial is a device that shows the current solar time during the day by using the shadow cast by the sun on a dial.
Q: How does a sundial work?
A: A sundial works by the sun casting a shadow on the dial, and a person using a marker to indicate the time at a certain shadow.
Q: Why does the shadow on a sundial change throughout the day?
A: The shadow on a sundial changes throughout the day because the sun appears to move through the sky, casting different shadows at different times.
Q: What are some common designs of sundials?
A: The 'ordinary' or standard horizontal garden sundial is a commonly seen design.
Q: Can sundials be designed for any surface?
A: Yes, sundials can be designed for any surface where a fixed object casts a predictable shadow.
Q: When were sundials first used?
A: Sundials were first used in Ancient Egypt, but were later developed further by other cultures, including the Greeks and the Romans.
Q: Are all sundials horizontal?
A: No, sundials can be horizontal, vertical, or tilted, depending on the design.
