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Results tagged with waves
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user 15702
Waves are disturbances that propagate through space and time. Classically, they travelled through a medium, disturbing the particles but not changing their mean position. Electromagnetic waves/particle-waves need no medium; they are disturbances in their respective fields.
5
votes
Is a soundproofed wall really only as strong as its weakest area?
When the sound waves encounter the wall their energy is absorbed by it (and if the soundproofing is good most of it won't reflect back nor will refract to the adjacent room). … Think for example of the camera obscura which is the same only with light waves instead of sound waves. …
- 727
3
votes
2
answers
454
views
Third order optical mixing
It's pretty straight-forward to visualise second-order non-linear optical mixing processes in which two waves of frequencies $\omega_{1}$ and $\omega_{2}$ mix up to generate new waves of different frequencies … For example the sum-frequency generation:
Or the difference-frequency generation:
But my question is, what new waves could the two ($\omega_{1}$ and $\omega_{2}$) waves generate by third-order non-linear …
- 727
3
votes
Accepted
Total internal reflection and waveguides
The phase-shift occurs due to the complex nature of the reflection coefficient. The so-called critical angle is given by:
$sin(\theta_M) = \frac{n_2}{n_1}$
As long as $\theta<\theta_M$ we have onl …
- 727