No examples have ever been observed. So far, with the state of the art in
sophisticated measurement techniques, the speed of light has been found
to be indistinguishable from the speed of light, and most modern Physicists
are convinced that they must be equal.
No, different types of waves travel at different speeds depending on the medium they are traveling through. For example, light waves travel faster in a vacuum than in other materials. Sound waves travel faster in solids than in gases.
Nothing is faster than the speed of light in a vacuum (other household appliances are left as an exercise for the reader). Electricity travels at essentially the speed of light in the conductive medium it's traveling through, but not faster.
Running faster than the speed of light
Something that moves faster than the speed of light is considered to be traveling superluminally. However, according to our current understanding of physics, nothing with mass can travel faster than the speed of light in a vacuum.
Nobody knows for sure. We have never witnessed a physical object traveling faster than the speed of light.
Radio waves are just low frequency light waves. They travel at the speed of light, much faster than sound waves which are just changes in pressure traveling in waves
The colors of light in order from fastest traveling to slowest are violet, blue, green, yellow, orange, and red. This is based on their respective wavelengths, with shorter wavelength light moving faster than longer wavelength light.
No plane is faster than light.
It might not be visible to the naked human eye, but when it wasn't traveling at the speed of light it would be visible. So no, it would not be literally invisible. Traveling faster than the speed of light would merely provide the illusion of invisiblity. If you were trying to detect it using visible light reflected from the rear as it moved away from you, yes, it would be invisible. But that condition is impossible, since faster-than-light travel is impossible. If it were possible, then light wouldn't be light, and time wouldn't be time and, very likely, the Universe simply would not be.
Nothing travels faster than light.
According to Einstein's theory of relativity, as an object with mass approaches the speed of light, its energy and mass increase infinitely, making it impossible to reach or exceed the speed of light. This is because the laws of physics prevent anything with mass from traveling faster than the speed of light.
According to the old black & white TV series, Superman was faster than a speeding bullet. Besides Superman, many things can be faster. However, light is always the fastest traveling thing, being MUCH faster than a bullet. Some airplanes and missiles can travel faster than some bullets.