Question

what is speed of light in vaccum?​

Answer 1

Explanation:

approximately 300,000 kilometers per second

approximately 300,000 kilometers per secondLight travels at approximately 300,000 kilometers per second in a vacuum, which has a refractive index of 1.0, but it slows down to 225,000 kilometers per second in water (refractive index of 1.3; see Figure 2) and 200,000 kilometers per second in glass (refractive index of 1.5).

Answer 2

Answer:

$3 \times 10 ^{8}$