Question

what is the speed of light​

Answer 1

Answer:

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. 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.

Answer 2

Answer:

Speed of light in :

• Vacuum = 3.0 × 10^8 m/s
• Water = 2.25 × 10^8 m/s
• Glass = 2.0 × 10^8 m/s