1
Question
Which of the following insrtuments measures time most accurately?
(a) sundial
(b) quartz watch
(c) pendulum clock
(d) watch with balance wheel
(a) sundial
(b) quartz watch
(c) pendulum clock
(d) watch with balance wheel
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Solution
(b) quartz watch
These watches have the crystals of a substance called quartz.
These crystals can vibrate very fast and at a very precise rate. These vibrations are used to measure time accurately.
These watches have the crystals of a substance called quartz.
These crystals can vibrate very fast and at a very precise rate. These vibrations are used to measure time accurately.
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