Question

What is the speed of light?

Hint:

This value is close to 300,000 kilometres every second and is called a universal constant.

Answer 1

The correct answer is approximately 300,000 kilometres per second.
The precise value in a vacuum is 299,792 kilometres per second, which is usually rounded off to 300,000 km/s for general use.
This speed is considered a universal constant and is denoted by the letter c in physics equations.
Light from the Sun takes about eight minutes to reach the Earth because of this speed.
According to Einstein's theory of relativity, nothing with mass can travel faster than the speed of light.
This value is used as a basic unit in astronomy to measure very large distances, such as a light-year.