The distance moved my the screw in one complete rotation in the circular scale
is called the pith of spherometer.
In general in any screw type instrument such as spherometer or screw gauge or micrometer the least count = pitch / no of head scale divisions Spherometer has an advantage of finding the depth in case of curved surfaces.
The reason a spherometer is called a spherometer is because it measures the radius of a sphere.
The reason a spherometer is called a spherometer is because it measures the radius of a sphere.
pitch is the linear progress made by the circular scale on the main scale in one complete rotation
abt spherometer
spherometer is an instrument used to measure the curvature of a sphere
A spherometer is an instrument for the precise measurement of the radius of a sphere. The spherometer directly measures a sagittal. Since the spherometer is essentially a type of micrometer, it measures very small things like millimeters.
The difference between screw gauge and spherometer is that spherometer can measure the dimensions of spherical surfaces but screw gauge cannot
because to determine the radius of curvatureof a given spherica surface by spherometer
drysdale
0.01mm
3/16" thick is the minimum thickness Sagiita that can be measured by means of spherometer.