The formula for average speed also called average velocity in physics and engineering is. As per the modern science speed of light is 186000 miles per second. C 1e0m012 2998 X 108mswas discovered since the speed of light had been accurately measured by then and its agreement with cwas not likely to be a coincidence.
We know exactly what the speed of light is.
The time it takes for the light from the Sun to reach the Earth is around 8 minutes. In 1983 an international commission on weights and measures set the speed of light in a vacuum at the calculation we use today. For a further discussion of the ways in which the speed of light has been measured see. C 1e0m012 2998 X 108mswas discovered since the speed of light had been accurately measured by then and its agreement with cwas not likely to be a coincidence.