Questions
Which of the following is the most precise device for measuring length?
a
A vernier callipers with 20 divisions on the sliding scale
b
An optical instrument that can measure length to within a wavelength
c
The gauge of pitch 1 mm and 100 divisions on the circular scale (c) A screw gauge
d
All the above are equally precise
detailed solution
Correct option is B
An optical instrument that can measure length to within a wavelengthTalk to our academic expert!
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