Dioptra is also an old astronomical and surveying instrument. The dioptra is a sighting tube or a rod with sight at both ends.
- Greek astronomers used this dioptra to find out the positions of stars.
- The dioptra was replaced by theodolite in surveying instruments.
- A book is also written for the usage of dioptra in surveying by Hero of Alexandria.
- Dioptra is also known as diopter which is also the unit of power of lens.
- It was the suitable instrument used for the precise measurement of horizantal,vertical and angular distances between two celestial or terrestrial objects
Very good work bro
ReplyDelete