Physics · Units and Measurements
Which of the following instruments provides the most precise device for measuring length among the given options?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1A standard laboratory meter scale with a least count of 1 mm
- 2An optical instrument that can measure length within a wavelength of light✓
- 3A screw gauge having a pitch of 1 mm and 100 divisions on the circular scale
- 4A vernier calliper with 20 divisions on the sliding scale
Correct answer
An optical instrument that can measure length within a wavelength of light
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