Physics · Units and Measurements
Which of the following is the most precise device for measuring length?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A vernier calipers with 20 divisions on the sliding scale
- 2A screw gauge of pitch 1 mm and 100 divisions on the circular scale
- 3An optical instrument that can measure length within a wavelength of light✓
- 4A standard digital micrometer with a resolution of 0.01 mm
Correct answer
An optical instrument that can measure length within a wavelength of light
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