Which of these is the correct unit for nanometer? A) 1 × 10^{− 12} m B) 1 × 10^{− 9} m C) 1 × 10^{− 6} m D) 1 × 10⁶ m E) 1 × 10⁹ m

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Quizplus · Accepted Answer

The prefix "nano-" means one billionth (1 × 10^-9) and the base unit of length in the metric system is meters (m). Therefore, 1 nanometer (nm) is equal to 1 × 10^-9 meters (m). Option B represents this value in scientific notation, where the exponent is -9, indicating that the decimal point moves 9 places to the left. The other options either have an incorrect exponent or include additional irrelevant information.

Which of These Is the Correct Unit for Nanometer