alleryA unit used for atomic sized lengths is the:
AAngstrom
BKilometre
CLight year
DParsec unit
Answer & Solution
Correct answer: A. Angstrom
1. Atomic sizes are far below a millimetre.
2. A special small unit is used for them.
3. That unit is the angstrom.
_Source: syllabus Physics Part I, Chapter 2, Units and Measurement._
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