What is a vernier scale ? Explain in detail .
Answers
Answer---⇘⇙
✭ Vernier scale is a small, movable,
graduated scale running parallel to the
fixed graduated scale of a sextant,
theodolite, barometer, etc., and used for
measuring a fractional part of one of the
divisions of the fixed scale.
✭◎ The vernier is a subsidiary scale
replacing a single measured-value
pointer, and has for instance ten
divisions equal in distance to nine
divisions on the main scale. The
interpolated reading is
obtained by observing which of the
vernier scale graduations is co-incident
with a graduation on the main scale,
which is easier to perceive than visual
estimation between two points. Such an
arrangement can go to higher resolution
by 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 to
lerances, on extants for navigation, on
theodolites in surveying, and generally
on scientific instruments.