Why is radio communication used in space?

In space, no one can hear you scream — because sound doesn’t travel in a vacuum, but also because you would need some sort of radio relay to carry the message, what with the distances being so extreme. Since the first satellite launched 61 years ago, spacecraft have relied on radio waves to communicate with Earth.

Why do astronauts talk to each other through radio telephone?

Sound can not travel through vacuum. There is no material medium in the space for propagation of sound. Hence astronauts talk to each other through radio telephone in space. In radio telephone, message of one astronauts reach to the other with the help of radio waves, which can travel through vacuum.

How do the astronauts talk with each other in space?

How do astronauts communicate with each other? The astronauts have devices in their helmets which transfer the sound waves from their voices into radio waves and transmit it to the ground (or other astronauts in space). This is exactly the same as how your radio at home works.

Why can’t astronauts hear each other in space?

No, you cannot hear any sounds in near-empty regions of space. Sound travels through the vibration of atoms and molecules in a medium (such as air or water). In space, where there is no air, sound has no way to travel.

How do radio signals travel through space?

Actually, radio waves travel very quickly through space. Radio waves are a kind of electromagnetic radiation, and thus they move at the speed of light. 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.

How do astronauts use radio waves?

Astronauts have devices in their helmets which transfer the sound waves from their voices into radio waves and transmit them to the ground (or other astronauts in space). This is how a radio at home works radio waves are often thought to be a form of sound but they are not sound waves.

What happens to radio waves over distance?

The intensity of radio waves over distance obeys the inverse-square law, which states that intensity is inversly proportional to the square of the distance from a source. Think of it this way: double the distance, and you get four times less power.