# The speed of light in a vacuum is 300,000 km / s. How many times does it exceed the speed

October 14, 2021 | education

| **The speed of light in a vacuum is 300,000 km / s. How many times does it exceed the speed of a supersonic aircraft, which is 1800 km / h?**

Let us express the speeds in the same units of measurement:

v (aircraft) = 1800 km / h = (1800/3600) km / s = 0.5 km / s;

v (light) / v (aircraft) = 300,000 / 0.5 = 600,000.

Answer: The speed of light is 600,000 times the speed of an airplane.