To determine the smallest unit among the options, we compare their values in meters: - micron (μm) = 10⁻⁶ meters - nanometre (nm) = 10⁻⁹ meters - angstrom (Å) = 10⁻¹⁰ meters (While not an official SI unit, it's commonly used) - fermimetre (fm) = 10⁻¹⁵ meters Comparing the exponents (-6, -9, -10, -15), -15 is the smallest value, making the fermimetre the smallest unit among the given options.
The smallest unit of length is
Asked in UPPCS Prelims 2005 · Topic: Measurement/Unit (Non-SI Units (e.g., Astronomical Unit, Light-Year, Electron-Volt))
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