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2. Vernier scale - Wikipedia

   en.wikipedia.org/wiki/Vernier_scale

   So for a vernier with a constant of 0.1, each mark on the vernier is spaced 9/10 of those on the main scale. If you put the two scales together with zero points aligned, the first mark on the vernier scale is 1/10 short of the first main scale mark, the second is 2/10 short, and so on up to the ninth mark, which is misaligned by 9/10.

3. 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 ...

4. Calipers - Wikipedia

   en.wikipedia.org/wiki/Calipers

   Vernier calipers commonly used in industry provide a precision to 0.01 mm (10 micrometres), or one thousandth of an inch. They are available in sizes that can measure up to 1828 mm (72 in). They are available in sizes that can measure up to 1828 mm (72 in).

5. Height gauge - Wikipedia

   en.wikipedia.org/wiki/Height_gauge

   The left height gauge has the vernier scale, while the right one is an electronic height gauge with a digital readout. A height gauge is a measuring device used for determining the height of objects, and for marking of items to be worked on.

6. Visual acuity - Wikipedia

   en.wikipedia.org/wiki/Visual_acuity

   [4] [5] The decline is according to E 2 /(E 2 +E), where E is eccentricity in degrees visual angle, and E 2 is a constant of approximately 2 degrees. [ 4 ] [ 6 ] [ 7 ] At 2 degrees eccentricity, for example, acuity is half the foveal value.