50,000,000 nanometers is equal to 0.0000 light-years. This is because the distance is extremely small compared to the vastness of a light-year.

Nanometers measure incredibly tiny distances at the atomic and molecular level, while light-years measure enormous astronomical distances. The scale difference is immense.

While not a common practical calculation, it's used to illustrate the extreme difference in scale between the microscopic and the cosmic.

A nanometer (nm) is a unit of length equal to one billionth of a meter (10^-9 m).