How fast do signals travel in space?

Adalberto Dietrich asked a question: How fast do signals travel in space?
Asked By: Adalberto Dietrich
Date created: Mon, Mar 22, 2021 11:49 PM
Date updated: Tue, Jun 28, 2022 7:59 PM


Top best answers to the question «How fast do signals travel in space»

Communications don't occur instantaneously. They're bound by a universal speed limit: the speed of light, about 186,000 miles per second.


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10 other answers

A TV signal is electromagnetic radiation (light), and light travels in a vacuum at exactly 299,792,458 meters per second, by definition. There have been several formal definitions of the meter (the SI base unit of length) but in 1983 we got our cu...

The speed of light is a little less than 300,000 km per second. At that speed, a beam of light could go around the Earth at the equator more then 7 times in a second. The reason that it takes so long for radio messages to travel in space is that space is mind-bogglingly big.

This means that the further away from the source, the more square units of area a signal has to ‘illuminate’. Another way to think of it, is that the strength of a radio signal will be only 1/4 as great once you are twice the distance from the source. At ten times the distance, the strength of the signal would only be one hundredth as great.

By Staff Writer Last Updated April 10, 2020 Radio waves travel at a velocity that is equal to the speed of light traveling in a vacuum, which is 186,282 miles per second. Top speed is only possible in empty space; passing through transparent liquids and solids like crystals cause waves to bend, which slows down their speed.

We know the signal is traveling at the speed of light, a constant at approximately 300,000 km/sec (186,000 miles/sec). Then, from how long our “two-way” measurement takes to go there and back, we...

Light traveling through Earth's atmosphere moves almost as fast as light in a vacuum, while light passing through a diamond is slowed to less than half that speed. Still, it travels through the gem...

Once the radio waves reach the vacuum of space it would travel at the speed of light, but before it reaches that point it may be slowed by objects on Earth.

The speed at which energy or signals travel down a cable is actually the speed of the electromagnetic wave traveling along (guided by) the cable. i.e. a cable is a form of a waveguide.The propagation of the wave is affected by the interaction with the material(s) in and surrounding the cable, caused by the presence of electric charge carriers (interacting with the electric field component) and ...

Project Cyclops (1971) was the initial investigation into the feasibility of a search for extraterrestrial intelligence. For example, on page 41, we can see that the minimum noise temperature of a receiver receiving the 2.4 GHz Arecibo message is about 4K - the major contributor to noise here is the CMB.

But in science, if you make a hard-and-fast rule, someone will try to disprove it, or at least find a loophole. And the speed of light is no exception. Light, in a vacuum, travels at approximately 299,792 kilometers per second (186,282 miles per second). In September 2011, physicists working on the Oscillation Project with Emulsion-tRacking Apparatus (OPERA) created a frenzy in the scientific community when they announced that their experiments resulted in subatomic particles called ...

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