Q: A student measured the thickness of a glass slip using a spherometer with least count 0.001 cm . The correct listing is
(a) 0.23 cm
(b) 0.234 mm
(c) 2.34 mm
(d) 0.234 cm
Sol: As least count of spherometer is 0.001 cm , the measurement in centimetre must be correct upto three places of decimal .
The correct listing is 0.234 cm