To answer this question, you need to understand how to convert a unit. In this case, the conversion would be meter to nanometer. Since 1 meter is 10^9 nanometer, then to convert it you need to multiply it with 10^9nm/1m which was equal to 1.
The calculation would be:
(1 * 10^-5 m) * (10^9nm / m) = 1* 10^4 nano meter= 10,000 nanometer
