What is speed of light in air

3*10^8m/s = speed of light in qair.

The speed of light in a vacuum is a fundamental constant of nature and is approximately 299,792,458 meters per second (m/s). However, the speed of light can vary when traveling through different mediums, including air.

To determine the speed of light in air, we need to consider that air is not a perfect vacuum but rather a medium with some density. The refractive index of air, which describes how much the speed of light slows down or changes direction when passing through it, is very close to 1.

Given the close approximation of air's refractive index to 1, we can assume that the speed of light in air is very similar to its speed in a vacuum. Therefore, for practical purposes, the speed of light in air is usually considered to be approximately equal to 299,792,458 meters per second (m/s).