Spherometers have three legs that form an equilateral triangle. Recall from geometry that three points determine a plane, so the three legs will always touch the glass . ... In this way a spherometer can measure both a positively or negatively curved surface to high accuracy.
What is the meaning of spherometer?
: an instrument for measuring the curvature of a surface .
Why is a Spherometer called so?
A spherometer basically is a precision instrument to measure very small lengths . Its name reflects the way it is used to measure the radii of curvature
What is the principle of spherometer?
The working principle of a spherometer is based on the micrometer screw . It is used for measuring with a small thickness of flat materials such as glass or for measuring the radius of curvature of a spherical surface.
What is H in spherometer?
Measuring the Radius of Curvature of the Concave Surface
, the height of central screw above the plane ABC, which is measured by the spherometer (h is called Sagitta .)
Pitch = Distance moved / Number of complete rotations and Least Count = Pitch / Number of divisions on head scale . Explanation: Pitch is the smallest value of length or any other unit which can be read directly from a main scale accurately.
How do you spell spherometer?
This shows grade level based on the word’s complexity. an instrument for measuring the curvature of spheres and curved surfaces.
What is the distance between two legs of spherometer?
SAI SPHEROMETER 1/100 M, DISTANCE BETWEEN THE LEGS IS 23 MM (PACK OF 3)
What is the radius of curvature formula?
Radius of Curvature Formula
R= 1/K , where R is the radius of curvature and K is the curvature.
What is vernier caliper least count?
A Vernier scale on a caliper may have a least count of 0.1 mm while a micrometer may have a least count of 0.01 mm. The least count error occurs with both systematic and random errors. Instruments of higher precision can reduce the least count error.
Is there any error in spherometer?
hello, why is it said that a spherometer has no zero error or its zero error is not considered? Answer: ... Zero error does not occur in spherometer because result is obtained by taking the difference of final and initial reading.
What is spherometer in physics class 11?
A spherometer is a measuring device which has a metallic triangular frame supported on three legs . The tips of the three legs form an equilateral triangle and lie on the radius. There is a central leg which can be moved in a perpendicular direction.
Where is spherometer used?
A spherometer is used primarily for measuring the curvature of objects such as lenses and curved mirrors .
What is radius of curvature in physics class 11?
Radius of curvature of a path at a point is a circle to which the curve of the path touches the circle tangentially . It tells us how much the curve is at this point. Less the radius of curvature, more pointed is the curve at the given point.
What is the least count of Screw gauge?
Figure 6: Screw Gauge using micrometer
It means that for one complete rotation of the thimble scale, 0.5 mm distance is traveled by the spindle. There are 50 divisions on circular scale. The least count will be 0.01 mm calculated as below.
