Which light travels faster in an optical fiber - ultraviolet or infrared?

Answer 1

Neither. All electromagnetic radiation (light) travels at a constant speed through whatever medium it encounters. Light in a vacuum, for instance, is about 186,282 miles per second; whereas in a fiber optic cable it chugs along at only 115,000 miles per second.*

What distinguishes ultraviolet from infrared is the amount of energy associated with it, reflected in its frequency. Assuming that a particular cable is transparent to both forms of radiation (which may or may not actually be the case, as another name for infrared radiation is heat) it is likely that the ultraviolet energy would travel farther before its signal would need to be reboosted.

*The speed of light through a medium is proportional to its index of refraction. The index of refraction of fiber optic cable is about 1.62; this means that light travels through it only about 60% as fast as it does through outer space.

Answer 2

infrared light travel faster as it has longer wave than red light and ultraviolet has shorter than blue or violet light.

Answer 3

Neither is inherently faster. They travel at the same speed as long as they are moving through the same medium.

Answer 4

The speed of light is constant. Ultraviolet light has shorter wavelengths, higher frequencies and greater energy than infrared light, but they both propagate at the same speed.

Answer 5

As long as they're both traveling through the same substance ... such as air, water,

glass, jello, optical fiber, scotch whiskey, or vacuum ... their speeds are identical.

Answer 6

In most media, all colors of light, as well as all other forms of

electromagnetic radiation, travel at the same speed.

Answer 7

They both travel at the speed of light, as do all electromagnetic waves.

Answer 8

Infrared

Answer 9

Infrared