Craig's Science topics #5: radio waves are amazing

[agent00f]

There's a big difference though in a large number of different signals all being in the same space all around you through the air, in contrast to the fast transmission of information over the wire.

Both impressive but different things.

This is entirely similar via WDM, https://en.wikipedia.org/wiki/Wavelength-division_multiplexing

 

[who?]

The cable companies are using switched digital video that only sends signals that somebody's cable box or cable card is asking for.That is why it takes a noticeable time for your system to change channels on cable.
In the nineteen seventies some cb radio fans with illegally powerful transmitters proved that too much power will bleed into other frequencies.
https://en.wikipedia.org/wiki/Switched_video

 

[agent00f]

The cable companies are using switched digital video that only sends signals that somebody's cable box or cable card is asking for.That is why it takes a noticeable time for your system to change channels on cable.
In the nineteen seventies some cb radio fans with illegally powerful transmitters proved that too much power will bleed into other frequencies.
https://en.wikipedia.org/wiki/Switched_video

That's actually mostly because with compressed digital video the tuner has to wait for the next key frame.

 

[Craig234]

The cable companies are using switched digital video that only sends signals that somebody's cable box or cable card is asking for.That is why it takes a noticeable time for your system to change channels on cable.
In the nineteen seventies some cb radio fans with illegally powerful transmitters proved that too much power will bleed into other frequencies.
https://en.wikipedia.org/wiki/Switched_video

That's an interesting aspect of the issue as well. So you can have a hundred (who knows how many) different audio signals in the same space - but none can be too 'strong' without starting to take a larger amount of the 'space' available for the waves.