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2. Vernier scale - Wikipedia

   en.wikipedia.org/wiki/Vernier_scale

   Vernier caliper scales; main at top, vernier at bottom. It reads 3.58 ± 0.02 mm by adding 3.00 mm (left red mark) on the fixed main scale to vernier 0.58 mm (right red mark). The main scale reading is that to the left of the zero on the vernier scale. The vernier reading is found by locating the best aligned lines between the two scales.

3. Calipers - Wikipedia

   en.wikipedia.org/wiki/Calipers

   The calipers in the diagram show a primary reading on the metric scale of about 2.475 cm (2.4 cm read from the main scale plus about 0.075 cm from the vernier scale). Calipers often have a "zero point error": meaning that the calipers do not read 0.000 cm when the jaws are closed.

4. Pierre Vernier - Wikipedia

   en.wikipedia.org/wiki/Pierre_Vernier

   Vernier caliper scales; main at top, vernier at bottom. It reads 3.58 mm ± 0.02 mm by adding 3.00 mm (left red mark) on the fixed main scale to vernier 0.58 mm (right red mark). The main scale reading is the rightmost graduation that is to the left of the zero on the vernier scale. The vernier reading is found by locating the best aligned ...

5. Micrometer (device) - Wikipedia

   en.wikipedia.org/wiki/Micrometer_(device)

   Vernier micrometer reading 5.783 ± 0.001 mm, comprising 5.5 mm on main screw lead scale, 0.28 mm on screw rotation scale, and 0.003 mm added from vernier. Some micrometers are provided with a vernier scale on the sleeve in addition to the regular graduations. These permit measurements within 0.001 millimetre to be made on metric micrometers ...

6. Vernier acuity - Wikipedia

   en.wikipedia.org/wiki/Vernier_acuity

   Animated vernier scale (“Nonius”): The lower rectangle is divided into 10 sections but is equal in length to 9 sections in the upper scale. It is used, e.g., in a vernier caliper. Vernier acuity (from the term "vernier scale", named after astronomer Pierre Vernier) is a type of visual acuity – more precisely of hyperacuity – that ...

7. Least count - Wikipedia

   en.wikipedia.org/wiki/Least_Count

   The stopwatch is more precise at measuring time intervals than the sundial because it has more "counts" (scale intervals) in each hour of elapsed time. Least count of an instrument is one of the very important tools in order to get accurate readings of instruments like vernier caliper and screw gauge used in various experiments.