Which of the following are true statements about the design of a sundial? Select

Question

Which of the following are true statements about the design of a sundial? Select the true statements and only the true statements.

Knowing the latitude where it will be used is essential -- for some dials, this is built into the design and for others it tells you how to mount and align the dial.

Knowing the longitude where it will be used is essential - -- for some dials, this is built into the design and for others it tells you how to mount and align the dial.

Knowing the latitude where it will be used is essential if you want the sundial time to match standard time on average over the year

Knowing the longitude where it will be used is essential if you want the sundial time to match standard time on average over the year.

If you want the sundial time to match standard time every day, you will need to incorporate the equation of time or an analemma in the design.

Knowing the climate of the location where this will be used is essential for determining how to line it up.

Explanation / Answer

1. True- Reading a sundial requires knowing your local latitude, your vertical direction, and True North.

2. False

3. TRUE- Reading a sundial requires knowing your local latitude, your vertical direction, and True North.

4. fALSE

5. TRUE - sundial time is not necessarily the same as clock time, as variation can be as much as 15 minutes! The orbit of our planet is not perfectly circular, and our rotation on our axis is not perfectly perpendicular to our orbit, so calculations must be made to obtain the official clock time

6. fALSE

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