Question

what is the speed of light in vacuum?​

Answer 1

Explanation:

The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is defined as 299792458 metres per second. Wikipedia

Astronomical units per day: 173

Miles per second: 186000

Metres per second: 299792458

Miles per hour: 671000000

Kilometres per hour: 1080000000

Parsecs per year: 0.307

From Sun to Earth (1 AU): 8.3 min

Answer 2

Answer:

3×10⁸ m/s

It is speed of light in vaccum.