Define the term 'Vernier constant'.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Vernier Scale**: The Vernier scale is a measuring instrument that enhances the precision of measurements. It consists of a main scale and a sliding Vernier scale.

2. **Main Scale Division**: The main scale is marked with divisions that represent a certain unit of measurement (for example, centimeters or millimeters).

3. **Vernier Scale Division**: The Vernier scale has its own divisions, which are slightly smaller than the divisions on the main scale. This allows for more precise readings.

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