reflecting goniometer
Quick Summary
A reflecting goniometer is a precision instrument used for accurately measuring the angles between the faces of small, smooth crystals. These faces reflect a clear image of a light source. By rotating the crystal, the image reflected from a second face can be aligned with the first. The angle of rotation, measured on a graduated circle, indicates the angle between the normals of the two faces.1
This type of goniometer is more precise than a contact goniometer and is essential for detailed crystallographic studies. Various forms exist, including horizontal-circle and two-circle goniometers, which offer different advantages for measuring angles in various crystal orientations.1
Ask Britannica AI about this topic
Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.