Question

The ratio of one micron to one nanometre is

• A. $10^3$
• B. $10^{-3}$
• C. $10^{-6}$
• D. $10^{-9}$

Answer 1

Answer: (A)

$1$ micron $(1\mu m)=10^{-6}m$
$1$ nanometre $(1nm)=10^{-9}m$
Their ratio is $\frac{\text{1 micron}}{\text{1 nanometre}}$
$=\frac{10^{-6}m}{10^{-9}m}=10^3$