Questions tagged [fluorescence]
This tag is for questions relating to "Fluorescence", an optical phenomenon in which the molecular absorption of energy in the form of photons triggers the emission of fluorescent photons with a longer wavelength.
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Physics of quantum beats in atomic vapor
Assume a low-pressure, low temperature-gas of atom subject to "vacuum fluctuations" where each atom is in the same superposition of two hyperfine states, both with an allowed transition to ...
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Is X-Ray-Emission-Containing Phosphorescence possible or is it limited to Immediate-Emission XRF?
This was a random thought that I wanted to follow up on. I know some materials can take in and kick out X-Rays in XRF (Though most x-ray scintillators tend to emit mostly visible light, not x-rays). ...
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Is luminescence from impact of fast neutral atoms/molecules on a suitable substance known?
Cathodoluminescence is emission of photons by electrons impacting on a luminescent material.
The Rutherford scattering experiments detected impacting helium nuclei on a phosphor screen.
Many other ...
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Can active sonar detect objects by "fluorescence" in a different frequency from the original pulse?
Just now a bumblebee flew past me (more than a meter away), and for a moment its prominent droning sound seemed to make a vibration on my face I could feel. It made me wonder: consider a bumblebee, ...
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Can we use prism in fluorescence microscope instead of dichroic mirror?
For the light path outlined here, if we use a prism instead of a dichroic mirror, the excitation light can also pass through the prism, but the emission filter can block the excitation wavelength if ...
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Why escape peak positions are calculated using emission energy and not absorbing energy?
For a X-ray monocromatic source, escape peaks energy positions are described by the difference between the incident energy and the fluorescence ($K_{\alpha}$ for example), like $E_{Escape Peak} = E_0 -...
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In fluorescence, if you excite a fluorophore with 2 wavelengths (one closer to the resonance wavelength than the other) will the emission change?
Say my fluorophore's resonance wavelength is 500nm. I excite the fluorophore with equal energies of 500nm and 550nm. The 550nm light excites the fluorophore, but is inherently weaker than 500nm ...
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Liquids that show fluorescense for detecting 532 laser
I have used tonic water and, better, antifreeze, for aligning UV lasers with sample cells in my various setups. I am now working with 532nm and would like a similar readily available substance. I did ...
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Convolution or addition? Proper way to model overlapping absorption line profiles
Suppose you obtain a measured spectral line shape (let's call it 'envelope') which appears as a skewed/asymmetric voigt profile. You know physically that the envelope line profile has this skew ...
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Why do fluorescence microscopes use long-pass dichroics
Superresolution fluorescence microscopy is very sensitive to chromatic aberration. Dichroic mirrors, while being biplanar, are not normal to the optical axis and so will cause some dispersion in one ...
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Mechanism causing red fluorescence from green (532nm) laser in household glass
Background / Experiment
I was surprised by this toot by @gigabecquerel, where the author shows red fluorescence in the thick bottom of a (drink) glass when exposed to a cheap consumer-grade green ...
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What a phosphor screen looks like after being hit by a single electron?
As I read on Wikipedia, a phosphor coating of a CRT screen lights up because an electron in one of the phosphor atoms emits light when it goes down from its excited state.
When a single electron hits ...
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Functional form of fluorescent light flicker in time
I will start with the disclaimer that I am a mathematician and do not know much about physics.
I am interested in modeling light emitted from fluorescent bulbs and am curious about the relative ...
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Can I use a radio to light a fluorescent light bulb?
I am trying to recreate the demo in this video, titled “How to create your own aurora.”
To summarize the video, a radio is used to light a fluorescent light bulb. The narrator describes the walkie ...
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Is inverse quantum confinement possible?
In the "Particle in a Box" thought experiment/analogy, the reduction in volume of a cavity enclosing a particle will lead to an increase in the bandgaps energy levels that simulate that of ...
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