Achieved by tilting the dial so that the angle between the gnomon and the (flat) ground is equal to the latitude of the given location. The gnomon will be pointed at the north star, tilted at an angle equal to your latitude. Horizontal this is the image of the common sundiala hori- zontal plate. As is the case with other sundials, the gnomon remains pointing north and at an angle equal to the latitude of where the sundial is to be. When you record the first hour, slightly tilt the gnomon towards that number and leave it tilted at that angle for the rest of the time. The various types of sundials, which are now more curiosities than tools,. For reasons youll see shortly, the rod, called a gnomon, must be. A linear gnomon aligned with this axis will cast a sheet of shadow (a.
Of 40â can be used at a latitude of 45â, if the sundial plane is tilted upwards by 5â,. If the gnomon is vertical, the time will not remain accurate throughout the year because earths axis is tilted and the earth moves around the sun. The gnomon of the equatorial sundial, which is at right angles to. With the tilt contribution to the deviation in time. Try our sundial science experiment & learn how the sun and the rotation of the earth. The first step in this experiment is to create the gnomon for the sund.). .