Questions tagged [frequency]
Frequency is the rate of repetitive aspect in the amplitude over a given dimension.
1,532 questions
7 votes
3 answers
2k views
Beating the uncertainty principle for musicians
https://www.phys.unsw.edu.au/jw/uncertainty.html The musician's uncertainty principle as above states that tuning can be less precise in short notes. But when we have a string with knowing its ...
- 111
1 vote
1 answer
62 views
Capacitance and propagation delay of straight optical fiber
Computer scientist by trade here, please excuse any bad usage of terminology or overgeneralization. Today I finally understood how electrical capacitance turns every element of a circuit into a low-...
- 11
2 votes
1 answer
89 views
Zeeman effect with Lummer Gehrcke plate lab experiment question (energy shift versus wavelength shift)
I'm trying to prove the following: $$\Delta f = \frac{c}{\lambda^2} \Delta \lambda.$$ For the moment I think it's ok to ignore the context, but for those interested it is in regards to observing the ...
- 1,151
1 vote
0 answers
28 views
Difference between graphing spectral irradiance by frequency versus wavelength [duplicate]
This web page includes two graphs, one of which shows the sun's spectral irradiance as a function of wavelength and the other as a function of frequency. On the first graph, the spectrum "peaks&...
- 11
-4 votes
1 answer
159 views
Wavelength and Energy relation [closed]
Wavelength $\lambda$ formula: $$\tag1\lambda=\frac h{mv}$$ Put here value of $h$ as $$\tag2h=\frac Ef$$ Then formula becomes: $$\tag3\lambda=\frac E{fmv}$$ In this formula, wavelength is directly ...
3 votes
3 answers
690 views
Additional, non-integer harmonics in Fourier transform of a wave
Suppose we have a periodic wave, for example a note played on an instrument. We assume ideal conditions, in the sense that the wave is periodic with frequency $\omega_0$. We want to know the relative ...
- 135
1 vote
1 answer
235 views
How can the EverTune electric guitar bridge possibly maintain intonation?
There is a (relatively) recent invention in the guitar world known as the EvertTune bridge. This system has many aficionados: people have it in their instruments and swear by it. This mechanical ...
- 3,134
10 votes
5 answers
2k views
Why do we name and separate invisible bands even though the whole EM spectrum is continuous?
I know that the electromagnetic spectrum is fundamentally continuous—ranging from radio waves and microwaves, through infrared, visible light, ultraviolet, X‑rays, to gamma rays—without sharp ...
- 683
0 votes
1 answer
169 views
Confusion about Displacement vs Time Graph for a Wave
How does the displacement of a single point over a period of time (displacement vs time graph) on either longitudinal or transverse wave determine the features of the wave (such as amplitude,...
0 votes
0 answers
81 views
Why do we hear sound of heart beats if heart beats at less than 20 Hz? [duplicate]
Our heart beats almost 72 times per minute which is less than 20Hz , still we do hear sound produced by heart beats . How is this possible?
- 1,481
1 vote
0 answers
111 views
Photoelectric Effect - Does frequency really have no impact on photocurrent?
My understanding of this was that for the same given intensity, two frequencies of light should (assuming both have enough energy to overcome the work function) induce the same photocurrent. However, ...
1 vote
2 answers
248 views
What is so special about harmonics that they have a single frequency?
To the extent I understand, pure sinusoidal functions, $$\sin(\omega t), \quad \cos(\omega t) \quad \text{or} \quad e^{i\omega t},$$ that exists for an infinitely long time, $-\infty\leq t\leq \infty$,...
- 12.9k
0 votes
3 answers
198 views
Confusion about the derivation for the formula of a traveling wave [closed]
I shall try to explain my understanding of how the formula for a travelling wave is derived, and then I'll show which part I don't understand. I hope you guys can help me to figure that part out. From ...
- 9
0 votes
0 answers
70 views
At what range of sound frequencies does water react/resonate?
I am going to be conducting an experiment and this is the research question: "How does the frequency of mechanical vibrations applied to water affect its rate of thermal energy loss, and how does ...
0 votes
1 answer
116 views
Wineglass acoustics frequency [closed]
I am doing a project about frequency of sound a wineglass makes, both empty and with some water in it. However, I got quite confused with the formulas. From https://www.nikhef.nl/~h73/tgo/praktgeluid/...
- 9