The gnomon of a sundial is cut to a certain size depending on the latitude of the sundial's location. If the gnomon is not of the correct size, it can be compensated for by raising or lowering the lower edge of the sundial until all times are accurate. Calibration is fairly simple. Using a precise time measurement, when it is noon, go outside and position the sundial so the shadow of the gnomon is on noon on the sundial. Check it again at 1 pm, and adjust as needed.
Good question. The simplest one is to fix a stick pointing out from a sun-facing wall of your house. The point of the shadow you can then calibrate. Old farm buildings sometimes have these.
sundial
The gnomon is the indicator on a sundial.
the importance of a sundial is for people to tell time.
You can't use a sundial in the night when its dark but you can tell the time using a sundial in daytime
Good question. The simplest one is to fix a stick pointing out from a sun-facing wall of your house. The point of the shadow you can then calibrate. Old farm buildings sometimes have these.
I have a sundial in the garden.The sundial were the earliest form of clocks.
sundial
He used a portable sundial.
The answer depends on what is wrog with the sundial.
The gnomon is the indicator on a sundial.