As well put by Wikipedia, a radio receiver has to perform three functions on the signal from the antenna:
- filtering, so you can tune the station you care about. This filters based on the frequency of the carrier wave you want. I.e. you use a bandpass filter.
- amplification: otherwise you won't be able to hear anything if the emitter is too far away
- demodulation: this means decoding the signal based on whatever way it was encoded, notably e.g. AM/FM
Change password without access:
Enable SSH on boot:
sudo touch /boot/ssh
Research group of the Department of physics of the University of Oxford Updated 2025-01-10 +Created 1970-01-01
The venerable first wiki.
The pre-Eternal September feeling is palpable.
People could freely comment their thoughts and sign below, making it much closer to what Ciro Santilli wants OurBigBook.com to be. But with upvotes ;-)
Nothing can better encapsulate the nostalgia of early day Internet. Genius at times, banal at others, you will be forever in our hearts!
The key is to define only the minimum number of measures: if you define more definitions become over constrained and could be inconsistent.
Learning the modern SI is also a great way to learn some interesting Physics.
Examples:
Unlisted articles are being shown, click here to show only listed articles.