This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.

3.00 x 108 m/s

Due to this EM waves show electric and magnetic field. An electric and magnetic field have no need a medium to show thier effect. Hence in the presence of electric and magnetic field vector which vibrate perpendeculer to each other and get pertervation EM waves travels in vacuum.

Light travels in waves, and, like sound, can be slowed depending on what it is traveling through. Nothing can outpace light in a vacuum. However, if a region contains any matter, even dust, light can bend when it comes in contact with the particles, which results in a decrease in speed.

Gamma rays

Generally speaking, we say that light travels in waves, and all electromagnetic radiation travels at the same speed which is about 3.0 * 108 meters per second through a vacuum. We call this the “speed of light”; nothing can move faster than the speed of light.

Through the vacuum of space, no matter what their energy is, they always travel at the speed of light. The highest-energy photon and the lowest-energy photon ever observed both travel at exactly the same speed. All massless particles travel at the speed of light, including the photon, gluon and gravitational…

Light as well as Gamma rays are electromagnetic in nature and all electromagnetic waves travel with same speed in vacuum. However in a medium, Gamma rays having the highest frequency among all electromagnetic radiation travel the fastest.

Alpha particles leaves the nucleus of an unstable atom at a speed of 16,000 kilometres per second, around a tenth the speed of light. Beta particles travel at a speed of 270,000 kilometres per second, around 98% of speed of light. Gamma particles travel at the speed of light.

The farthest observed is GRB 090423 at a distance of 13 billions of light years. In general any electromagnetic signal can travel forever if does not interact with any object.

Photons, by their very nature, cannot exceed the speed of light, but particles of light are not the only massless entity in the universe. Empty space contains no material substance and therefore, by definition, has no mass. “Therefore, empty space can certainly expand faster than light.”

At the horizon, space is falling into the black hole at the speed of light. It is true that nothing can travel through space faster than light. However, in general relativity, space itself can do whatever it likes.

If a black hole were to form from the Earth itself, it would create an event horizon just 1.7 centimeters in diameter. Eventually, some time later, any object at rest — no matter how far away from the event horizon it initially was — will cross that horizon and encounter the central singularity.

The edge of the Earth closest to the black hole would feel a much stronger force than the far side. As such, the doom of the entire planet would be at hand. But don’t lose too much sleep, we’d have to be unfortunate to “hit” a black hole in the first place – and we might live on holographically after the crunch anyway.

The black hole would need to be roughly 100 million kg, and it will take many hours or days to fully destroy Earth. Very low-mass black holes are expected to undergo rapid decay through Hawking radiation.

There Are at Least 4 Ways a Black Hole Could Kill You

• Spaghettification. Black holes form when a massive object, like a star, collapses and squeezes all of its mass into an impossibly small point with infinite density, known as a singularity.
• Fried by Accretion Disk.
• Zapped by Plasma Jet.
• Incinerated by Firewall.

In space or on the Moon there is no atmosphere to scatter light. The light from the sun travels a straight line without scattering and all the colors stay together. Looking toward the sun we thus see a brilliant white light while looking away we would see only the darkness of empty space.