It's possible to capture radio (channel) signal that is being played during the 70s?

Question

i mean captured the energy (song) that is being played during the 70s. Cause energy cannot be destroy it only change into another form of energy.

Answer 1

yes, all electromagnetic waves travel at the speed of light to infinity. All of our radio and tv broadcasts since 1936 have been radiating out from Earth at the speed of light. So to receive a transmission from the 70s you would have to go, say, 35 lights years away to receive a transmission from 1972. and you can record the song i'm sure...

Answer 2

I don't think the question put any limits on the capture, such as presently living earth inhabitants. So yes, if there life forms with radio technology 24-33 lightyears out in space then radio signals from then would be blast past.

BTW I don't this is a clean application of the inverse square law, as AM radio waves are typically beamed so that all 50,000 watt are radiated perpendicularly, but some energy is reflected by the ionosphere. Further, the Earth itself is giant ground wave, and that helps to boost the precieved energy output, much like the band shell at an outdoor concert.

Answer 3

NO Regardless of how good your equipment is every amplifier contributes a small amount of noise. The star background also contributes noise . About being several light years away, want work ,as the energy is inverse the square of the distance. I have worked with an amplifier with the noise figure of 4 deg. Calvin. cooled with liquid helium.

Answer 4

I don't know, but my brother tuned into a station at christmas time on this old big 50's style radio. Well, the station does not exsist around here at all and the creepy thing, it was playing old 50's style christmas music. Twighltight zone? Or what?

Answer 5

since radio energy can not be destroyed, yes, it would be possable. how to do it ? thats a diffrent question

Answer 6

Yes....but you'd have to be about 30 or 35 light years away to pick it up NOW.