does light travel faster through glass or a vacumm?
A medium (air, glass, water, etc) other than a vacuum slows the speed of light.
The energy of a mechanical wave depends on the amplitude of the wave
true or false?
Light travels faster through a vacuum than through glass. In a vacuum, such as outer space, light can travel at its maximum speed, which is approximately 299,792 kilometers per second (or about 186,282 miles per second) in a vacuum. However, when light passes through a medium, such as glass, it interacts with the atoms or molecules of the material, causing it to slow down.
To understand why light travels slower in a medium like glass, you need to know about the concept of the refractive index. The refractive index is a measure of how much a material bends or refracts light. Different materials have different refractive indices, which determine how light behaves when it passes through them.
In general, the refractive index of glass is higher than that of a vacuum. This means that when light enters glass, it slows down because its speed is dependent on the refractive index of the medium. The higher the refractive index, the slower the light travels.
So, to answer your question, light travels faster through a vacuum than through glass.