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Which of the following is the most preci...

Which of the following is the most precise device for measuring length
(i) a vernier calipers with 20 divisions on the sliding scale (ii) a screw gauge of pitch Imm and 100 divisions on the circular scale (iii) an optical instrument that can measure length to within a wavelength of light? 

A

Vernier calipers

B

Screw guage

C

Optical instrument

D

All the above

Text Solution

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The correct Answer is:
C
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