One nanometer is:

This question was previously asked in
RRB ALP CBT I 17 Aug 2018 Shift 3 Official Paper
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  1. 10-11 m
  2. 10-10 m
  3. 10-8 m
  4. 10-9 m

Answer (Detailed Solution Below)

Option 4 : 10-9 m
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Detailed Solution

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The correct answer is 10-9m.

Key Points

  • A nanometer is a very small unit of length.
  • Generally, it is used to measure wavelength, airborne particle size, microorganisms, etc.
  • 1 nanometer or 1 nm is equal to 10-6mm.
  • 1 mm is equal to 10-3m.
  • So, 1 nm is equivalent to 10-9m.

Additional Information

Prefix Symbol Decimal Power
exa E 1018
Peta 1015
Tera T 1012
Giga G 109
Mega M 106
Kilo k 103
Hecto h 102
deca da 101
meter m 100
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