Is Light Faster in Air or Glass?

Curious about whether light travels faster in air or glass? Here's the breakdown:

Light's speed is generally slower in mediums like glass compared to its speed in a vacuum or air. In a vacuum, light zips along at approximately 299,792,458 meters per second, denoted as 'c.' However, when light enters a different medium, like air or glass, its speed decreases. This slowdown happens because light interacts with the atoms and molecules present in the medium.

The exact speed of light within a specific medium, whether it's air or glass, depends on that medium's refractive index. Generally, glass boasts a higher refractive index than air. This difference means light experiences a more significant slowdown while traversing glass compared to air.