How long do radio waves last?
It can last forever, but becomes undetectable rather quickly, at least with the equipment most of us currently have access to.
There are radio telescopes that can detect radio waves from near the beginning of time and many millions of light years away.
Radio waves could, in theory travel for light years..
Why is it dark in outer space?
The daytime sky is blue because light from the nearby Sun hits molecules in the Earth’s atmosphere and scatters off in all directions. … At night, when that part of Earth is facing away from the Sun, space looks black because there is no nearby bright source of light, like the Sun, to be scattered.
Can you hear old radio waves?
Every radio broadcast you hear is technically “from the past”, since it takes a finite amount of time to reach your receiver, and another finite amount of time to travel as sound waves from your speaker to your ears. … Once a radio wave (and the signal it carries) passes you, it’s never coming back.
Do radio waves go on forever?
The earliest radio waves emitted from earth are currently about 200 light years away. However as mentioned before they will keep going forever getting harder and harder to detect as time passes. They will travel forever radiating from the Earth at the speed of light.
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.