10−4 m10^{-4} \mathrm{~m}10−4 m
10−7 m10^{-7} \mathrm{~m}10−7 m
10−10 m10^{-10} \mathrm{~m}10−10 m
10−12 m10^{-12} \mathrm{~m}10−12 m
