system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What exactly is happening when turning the tuner knob on an analog radio. How does it 'grab' the specific station out of the air?
gpt
* The antenna on your radio is picking all broadcasts in your area at the same time.
* The radio works by filtering everything out except the station you want to hear.
* Turning the knob changes the resistance on the filter circuit inside your radio.
* Changing the ~~resistance~~  capacitance  in the circuit changes the center frequency of the filter.
* When the ~~resistance~~ capacitance  is *just right* the filter works best and the audio is clear.