2006-07-26 13:13:42 · 4 answers · asked by bricabrac 3 in Science & Mathematics ➔ Physics
Interesting question.
A quarter-wave antenna to receive 60 Hertz would be 1,250 kilometers long (Ref. 1)...
Then again, the "ELF" (Extra Low Frequency) band goes down to 30 Hertz. I think I read that the Navy is using ELF to talk to submarines.
I guess my answer would be yes- hard to build an antenna to radiate/receive it- notwithstanding that you have to go out of your way to filter 60-cycle hum out of conventional power supplies.
2006-07-26 14:03:03 · answer #1 · answered by Fred S 2 · 1⤊ 0⤋
Mostly false. As the frequency goes to zero the wave essentially stops existing, so yes, these would be hard to find because the part that "wiggles" wiggles too slowly to detect. However, 60 Hz is the frequency of alternating current in the United States, and is easy to produce as well as detect.
2006-07-26 20:22:36 · answer #2 · answered by kain2396 3 · 0⤊ 0⤋
False
2006-07-26 20:18:01 · answer #3 · answered by lordkelvin 7 · 0⤊ 0⤋
No problems, We talk at low frequencies (see microphones)
2006-07-26 20:40:59 · answer #4 · answered by DoctaB01 2 · 0⤊ 0⤋