[amp_mcq option1=”10-6m” option2=”10-8m” option3=”10-9m” option4=”10-5m” correct=”option3″]
The correct answer is C. 10-9m.
A nanometer is a unit of length in the metric system equal to one billionth of a meter (10-9 m). It is often used to measure the size of atoms and molecules.
Option A is incorrect because 10-6 m is equal to one micrometer.
Option B is incorrect because 10-8 m is equal to one nanoangstrom.
Option D is incorrect because 10-5 m is equal to one micrometer.