The resonance tag has no wiki summary.
52
votes
6answers
2k views
Why do tuning forks have two prongs?
I believe the purpose of a tuning fork is to produce a single pure frequency of vibration. How do two coupled vibrating prongs isolate a single frequency? Is it possible to produce the same effect ...
14
votes
1answer
581 views
Why don't tuning forks have three prongs?
I was reading Why tuning forks have two prongs?. The top answer said the reason was to reduce oscillation through the hand holding the other prong.
So if having 2 prongs will reduce oscillation loss, ...
4
votes
4answers
806 views
How does radio receives signal from particular station?
When you tune your radio (digital or analog) to receive say 100 MHz frequency and while in the environment there are hundreds of channels everywhere around the radio. How does it chooses to receive ...
13
votes
2answers
241 views
Is the length of the day increasing?
In Frontiers of Astronomy, Fred Hoyle advanced an idea from E.E.R.Holmberg that although the Earth's day was originally much shorter than it is now, and has lengthened owing to tidal friction, that ...
3
votes
2answers
255 views
How might a resonant antenna and black body radiation interact?
How does an antenna behave when it is cooled so that its black-body radiation is emitting energy at its resonant frequency?
Edit: To clarify, its not how they're related in general, but how might ...
2
votes
2answers
550 views
Phase difference of driving frequency and oscillating frequency
If a mass is attached to a spring and is oscillating (SHM). If a driving force is applied it must be at the same frequency as the mass's oscillation frequency. However I'm told that the phase ...
2
votes
1answer
778 views
Does the Breit Wigner formula apply to intermediate virtual particles?
Breit Wigner Formula describes the cross section for interactions that proceed dominantly via a intermediate particle (O*) A+B → O* → C + D:
$$σ = \frac{2\Pi}{k^{2}}\frac{Γ_{i}Γ_{f}}{(E-E_{o})^{2} + ...
0
votes
1answer
216 views
Resonant inductive coupling and Schumann resonances
I was reading about WiTricity (http://en.wikipedia.org/wiki/WiTricity) a technology developed by MIT to wirelessly transmit electricity through resonance, and I have this question:
Given the ...
0
votes
1answer
165 views
What makes up a resonator of radio?
I was reading this article about resonators.
Quote:
The sine wave that matches that particular frequency will get
amplified by the resonator, and all of the other frequencies will be
...
