# Questions tagged [frequency]

Frequency is the rate of repetitive aspect in the amplitude over a given dimension.

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### What is the frequency of a standing wave? [closed]

I understand that constructive interference of waves results in standing waves. And for a wire with both ends fixed the frequency should match the fundamental frequency of the wire to produce standing ...
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### What is the mathematical support for the formula $f_n = n f_1$, used to calculate the frequency of a standing wave? [closed]

could someone explain to me the mathematical support for the formula $f_n = n f_1$. This formula refers to the fact that the frequency of a standing wave is equal to the number of antinodes times the ...
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### Can the laser light, in principle, take any wavelength in the EM spectrum?

Can the laser light, in principle, take any wavelength in the EM spectrum? I don't think there is what prevent this in principle, right?
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### Why Does Planck's Relation $E=hf$ Imply a Linear Relationship Only for Sinusoidal Frequency Bases?

I have been studying quantum mechanics and I came across Planck's relation which describes the energy $E$ of a photon as being directly proportional to its frequency $f$, with Planck's constant $h$ as ...
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### Why are laser linewidths in frequency domain?

I am learning about the lasers and I find one thing confusing about the lasers. I understand that there is a range of wavelength laser, it is never exactly monochromatic. So, I understand the concept ...