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What is a vernier scale ? Explain in detail . |
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Answer» --⇘⇙✭ Vernier scale is a small, movable,graduated scale running parallel to thefixed graduated scale of a sextant,theodolite, barometer, etc., and used formeasuring a fractional part of one of thedivisions of the fixed scale.✭◎ The vernier is a subsidiary scalereplacing a single measured-value pointer, and has for INSTANCE ten divisions equal in distance to ninedivisions on the main scale. Theinterpolated reading isobtained by observing which of thevernier scale graduations is co-incidentwith a graduation on the main scale,which is easier to perceive than visualestimation between TWO points. Such anarrangement can GO to higher resolutionby using higher scale ratios, KNOWN as the vernier constant. A vernier may be used on circular or straight scales where a simple linear mechanism is adequate.◎ Examples are calipers and micrometers to MEASURE to fine tolerances, on extants for navigation, ontheodolites in surveying, and generally on scientific instruments. |
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