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One nanometer is equal to

  • A.10−6 m
  • B.10−8 m
  • C.10−9 m
  • D.10−5 m

Answer: C

One nanometre equals \(10^{-9}\) m.

The prefix nano- means one thousand-millionth. For scale, an atom is a few tenths of a nanometre across and visible light has wavelengths of 400 to 700 nm.

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