All Questions
7
questions
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votes
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answers
13
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Simultaneous measurement of the size and mass of nanoparticles in liquid
The size of colloidal nanoparticles in a liquid can be measured from optical reflectance (or absorption) spectra. The smaller the metal (semiconductor) nanoparticle, the more its color shifts to the ...
- 158
0
votes
0
answers
56
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Are there any videos of diffraction grading experiments one photon at a time?
I have seen the video of a double slit one photon at a time but wondering if there is a video of a Diffraction grading experiment one photon at a time.
- 4,083
2
votes
2
answers
39
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Is this interference or superimposed image?
When you overlay two identical screens a new patterns forms as they offset. See image:
The two screens are not touching or interacting with each other.
Are the different patterns we see as the two ...
- 4,083
0
votes
1
answer
66
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Does the minimum slit width change with different photon frequencies?
Send white light through a vertical polarizer and then through a second horizontal gap that is just wide enough to let all the light through. Now slowly close the second gap until it becomes a slit. ...
- 4,083
1
vote
2
answers
1k
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$\omega(k)$ and $k(\omega)$ about waves
Wave propagation is characterized by the wavenumber $k$ and the angular frequency $\omega$. Sometimes (like in this answer) the relation $\omega (k)$ is preferred; sometimes instead $k ( \omega)$ is ...
- 767
12
votes
6
answers
8k
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Light's inverse square law: Does it require a minimum distance from the source?
Does the inverse square law begin to take effect the moment light leaves its source? For example, does light's intensity decrease, i.e. does the area in which the photons might land increase, at a few ...
- 539
2
votes
1
answer
1k
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relation between Schrodinger equation and wave equation [duplicate]
I have always been confused by the relationship between the Schrödinger equation and the wave equation.
$$ i\hbar \frac{\partial \psi}{\partial t} = - \frac{\hbar^2}{2m} \nabla^2+ U \psi \hspace{0....
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