1.6 Which of the following is the most precise device for measuring length :
PHYSICS · Single correct · A Level · Physics · Measurements and their errors · Measurements and their errors
Problem
1.6 Which of the following is the most precise device for measuring length :
(a) a vernier callipers with 20 divisions on the sliding scale
(b) a screw gauge of pitch 1 mm and 100 divisions on the circular scale
(c) an optical instrument that can measure length to within a wavelength of light ?