4 ms·
82 Hz implies a wavelength of ~4000km in vacuum. It’s extremely low frequency by comparison with the kind of radio spectrum we usually use. The Wikipedia page
by pja 5y ago
82 Hz implies a wavelength of ~4000km in vacuum. It’s extremely low frequency by comparison with the kind of radio spectrum we usually use.
The Wikipedia page gives a good overview: https://en.wikipedia.org/wiki/Radio_spectrum https://en.wikipedia.org/wiki/Radio_spectrum
- TedDoesntTalk 5y agoIsn’t that audible? And with megawatts of power… think of the whales!
- vel0city 5y agoIts still electromagnetic waves not pressure waves so they're not audible. Still, I'd recommend not being very close to the transmitter if its putting out megawatts of power.
- pja 5y agoNah, it’s electromagnetic & your ears are too small to intercept the transmission to any kind of significant extent. A few MW sounds a lot, but the inverse square law applies - once you get to the ocean the power density is going to be very low. Plus penetration into the ocean itself isn’t going to be great - there’s an impedence mismatch between the water and the air.
- bigiain 5y agoYou know that hum you get when mains powered audio get gets a certain kind of interference? That's 60Hz (or 50Hz depending on where you are) of moving air. It's not the 50Hz electromagnetism you h4ear though, it's that getting picked up by the amplifier and played out through the speakers which move the air. 87Hz is right about the second lowest F key on a piano. (the 21 key up from the lowest note on an 88key piano), or the low E string on a guitar at the first F fret.