Sundial. This time-keeping instrument indicates the time of day by means of a shadow cast on its surface,which is marked with hours. The shadow- casting marker is known as the gnomon. Tables are used to calculate standard time from the solar time that varies throughout the year | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Tek Image |
Bildgröße: | 3750 px × 3756 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |