What travels at the light of speed?

Answer 1

What's true is that nothing moves faster than light in a vacuum. But light slows down in other substances, such as air. It is thus possible for particles with extraordinarily high energy to move faster than light through the Earth's atmosphere, for example - a phenomenon with some interesting consequences.

Particles that travel faster than light through the atmosphere produce radiation that scientists liken to the sonic boom produced by faster-than-sound travel. This effect, called Cerenkov Radiation, can provide some clues about the composition of the original particles. That's proved to be particularly interesting to scientists studying cosmic rays.

Cosmic rays are particles from outer space, often protons or complete atomic nuclei, that frequently strike the Earth's atmosphere with enough energy to fall into this faster-than-light category, emitting

Cerenkov radiation.

the electromagnetic spectrum is all the different forms of light that also travel at the speed of light.

This includes:

• Radio waves
• Micro waves
• Infra red
• Visible light
• Ultra violet
• X-rays
• Gamma rays

Answer 2

The current itself. It is like a wave, in the sense that energy is transferred from one electron to the next. By the way, it's not exactly the speed of light - at least, not the speed of light in the vacuum. A typical value is about 2/3 the speed of light in a vacuum.

Answer 3

Light for instance. The actual lightning bolt consists of electrons flowing along an ionized path, which takes some time to establish itself.

Answer 4

Nothing in the universe can travel as fast as light, which travels at around 186,000 miles per second.

Answer 5

Light travels at a speed known as the "speed of light"; actually all electromagnetic waves travel at the same speed. This speed is about 300,000 km/sec.

Answer 6

Photons.